PSYC3015PT.2

  1. WHAT IS COGNITIVE NEUROSCIENCE?:
    • looks at cognitive processes 
    • uses a lot of techniques e.g. behaviour, eye-tracking, physiology, neuroimaging and case-studies.
    • examines humans and non-human animals.
  2. IV'S?:
    CAN BE CATEGORICAL/DISCRETE WHICH MEANS THAT THEY HAVE LEVELS OR CONDITIONS e.g. with "handedness" you could have L, R OR AMB. OR CONTINUOUS E.G. AGE. common IV'S are e.g. individual difference variables, neuropsychological case vs. healthy participants and TMS.
  3. DV'S?:
    • NORMALLY CONTINUOUS E.G. RT. BUT CAN BE CATEGORICAL E.G. RANKS.
    • common DV'S are e.g. electroencephalography EEG, ERP, eye-tracking, accuracy and RT, FRMRI, MVPA, DTI AND MEG.
  4. THE TYPES OF EXPERIMENTAL DESIGNS?:
    repeated-measures aka. within and;  independent groups aka. between.
  5. PRINCIPLES TO USE INTERPRETING THE EXPERIMENTAL DESIGN?:
    • good to have a good question or hypothesis going in
    • Has been derived from research.
    • Powerful designs normally have to theories that predict different data.
    • exploratory research is good when not much is known. This can then motivate the future research.
    • need to be specific, falsifiable e.g. has conditions that can be falsified.
    • operationization.
    • paradigms should be carefully chosen and be optimal.
    • THE CRITICAL ANALYSIS SHOULD MATCH THE CONCEPT TO THE OPERALIZATION AND THE DATA AND THE CONCLUSION.
  6. THE TWO FACTORS THAT HAVE BEEN THEORIZED TO CONTRIBUTE TO OBJECT CORRESPONDENCE?:
    • SPATIOTEMPORAL TRAJECTORY. E.G. does it come back at the same location that was expected from the object's initial trajectory. (Features are the same).
    • AND FEATURE SIMILARITY E.G. does it have the same properties (e.g. colour and shape) as the original object? (The trajectory is the same).
    • BOTH WOULD BE A COLOUR AND LOCATION CHANGE.
  7. HOW TO MEASURE OBJECT CORRESPONDENCE?:
    • HAVE A SAME-OBJECT TRIAL E.G. there's a square (S) and a triangle (P). Then they move and the P re-appears in the triangle.
    • DIFFERENT-OBJECT TRIAL E.G. THE SAME AS BEFORE BUT THE P RE-APPEARS IN THE SQUARE.
    • RT IS NORMALLY FAST FOR THE SOC THAN THE DOC. THIS DIFFERENCE IS CALLED THE "OBJECT-SPECIFIC PREVIEW BENEFIT".
    • The first evidence that the brain tracks objects e.g. with the motion linked to the shapes we would expect a certain letter to re-appear in a certain shape.
  8. FLOMBAUM AND SCHOLL (2006)?: ***SLIDE 56.
    • DETECTED FEATURE CHANGES IN TRAVELLING AND TEMPORARILY OCCLUDED OBJECTS.
    • THEY MANIPULATED SPATIOTEMPORAL TRAJECTORY AND MEASURED HOW THESE CHANGES AFFECTED THE CHANGE DETECTION
    • e.g. had 3 pillars and a ball that rolled behind them. The manipulation was when the ball went in at the top and came out the bottom. Participants then had to click a button when there was a colour change.
    • Believed that participants would be quicker (and more accurate) at detecting feature changes after occlusion when they were able to perceive the same object through time. 
    • There would be bad change detection when they thought that they were 2 distinct objects.
  9. THE DATA?:
    WERE WAY BETTER AT DETECTING IN THE TUNNEL CONDITION THAN THE SPATIAL OR TEMPORAL MANIPULATIONS. THESE IMPAIRED THEIR COLOUR DETECTION. NOT SUPPORTIVE E.G. lecture. said that we have a "spatiotemporal bias". didn't examine the features by themselves (e.g. without the OC) and didn't consider an important aspect in their interpretation.
  10. pt.2
  11. OBJECT CORRESPONDENCE?:
    is the object that comes out the same/different when it passes behind an occluder.
  12. THE FUSIFORM GYRUS?:
    THE FUSIFORM FACE AREA (AKA. FFA). CAN ALSO ENCODE ANY TYPE OF EXPERTISE.
  13. YI ET. AL (2008).
    • USED THE FFA AND MEASURED OBJECT CORRESPONDENCE IN RELATION TO REPETITION SUPPRESSION. greater suppression = treating it as the same object to a greater extent.
    • FOUR CONDITIONS E.G.
    • 1. continuous and unrepeated (e.g. same occluder and different face).
    • 2. continuous and repeated (e.g. same occluder and the same face).
    • 3. discontinuous and unrepeated (e.g. object emerges from a different occluder + different face).
    • 4. discontinuous and repeated (e.g. emerges from a different occluder + the same face).
    • there was a bigger difference between the unrepeated and the related trials in the continuous trial.
    • didn't examine the features by themselves (e.g. without the OC).
  14. HOLLINGWORTH AND FRANCONERI (2009)?:
    • USED A CHANGE DETECTION MEASURE E.G. HAD TO JUDGE WHETHER 2 IMAGES WERE THE SAME OR DIFFERENT TO THE PREVIEW.
    • in 1/2 the trials one pair of the objects changed throughout the trial.
    • manipulated spatiotemporal trajectory and the features pre-and-post occlusion.
    • OC was measured with RT (assumed that RT would be quicker when there's more object correspondence. Can detect the changes quicker).
    • WERE FASTER IN THE CONSISTENT CONDITIONS. 2. CONSISTENT POSITION AND INCONSISTENT COLOUR; 3. CONSISTENT COLOUR AND INCONSISTENT POSITION AND; 4. INCONSISTENT.
  15. RICHARD ET. AL (2008)?:***SLIDE51AND53.
    • USED SACCADES TO MEASURE OC. THEIR TASK WAS TO MOVE THEIR EYES FROM THE CENTRE OF THE SCREEN TO THE SIGNALED TARGET.
    • exploited "saccadic suppression". 
    • Each trial had different positions and different features. Recorded RT and whether the correct saccade was made.
    • how does changing the position interfere saccading to the target feature?
    • how does changing the feature interfere with saccading to the target position?
    • POSITION + FEATURE CHANGES INTERFERED WITH THEIR ABILITY TO INFER OC
    • WERE GOOD WHEN THERE WAS NO SWITCH. OK WHEN THERE WAS A SACCADE TO POSITION AND INCONSISTENT COLOUR. WORSE WHEN THERE WAS A SACCADE TO COLOUR AND AN INCONSISTENT POSITION. They needed to correct their saccade more in this condition as well.
  16. RICHARD ET. AL (2008) EXP.2?:
    • USED REAL-WORLD AND RECOGNIZABLE OBJECTS E.G. A TOMATO AND A DUCK. 
    • THERE WAS THE SAME PATTERN (incl. saccadic correction).
    • POSITION AND FEATURE CHANGES INTERFERED WITH THE OC FOR REAL-WORLD OBJECTS.
  17. HEIN AND MOORE (2012)?:***SLIDE60.
    • USED THE TERNUS DISPLAY E.G. LOOKED AT HOW FEATURES IMPACTED OBJECT GROUP AND OC.
    • e.g. element motion (ABC-BCA) AND group motion (ABC-ABC). done with colours + lines etc.
    • polarity, colour and orientation (+hue) all bias our perception towards group AND element motion. They all effect our inference of OC.
  18. THE FINAL VERDICT?:
    THERE IS A LOT OF EVIDENCE THAT SUGGESTS THAT BOTH FEATURES AND SPATIOTEMPORAL TRAJECTORY EFFECT OC IN THE ENVIRONMENT (E.G. OCCLUSION)+ A PARTICIPANT'S OWN EYE-MOVEMENTS.
  19. pt.3
  20. SPATIAL ATTENTION?:
    THE ABILITY TO SELECTIVELY PROCESS ANY INCOMING SENSORY INFORMATION AND FILTER OUT IRRELEVANT VISUAL NOISE.
  21. THE TYPES OF SPATIAL ATTENTION?:
    • ORIENTING ATTENTION e.g. shifting your attention across the visual field.
    • SPLITTING ATTENTION e.g. attending to two (or more) spatially different locations at the same time.
    • ATTENTION BREADTH e.g. changing the spatial region over which your attention is focused (e.g. little to big).
  22. OVERT VS. COVERT?:
    O = WITHOUT EYE MOVEMENTS AND C = WITH EYE MOVEMENTS.
  23. ENDOGENOUS VS. EXOGENOUS ATTENTION?:
    • ENDOGENOUS = voluntary and top-down. draws our attention to stimuli based on our current goals.
    • E.G. LOOKING AT THE CAFE DOOR WHEN YOU'RE EXPECTING SOMEONE THERE.
    • EXOGENOUS = involuntary and bottom-up. driven by the environment.
    • E.G. AN UNEXPECTED MOUSE RUNNING PAST.
  24. WHAT IS ATTENTION BREADTH?:
    • WE ALTER THE SPATIAL REGION OVER WHICH OUR ATTENTION IS DISTRIBUTED. 
    • IT GIVES US INSIGHT INTO COGNITION.
    • e.g. does altering the breadth of attention effect our visual perception? Relatively new area of research.
    • First examined how narrow vs. broad attention effect target detection RT's.
    • Now looking at how attention effects other components of vision. There's no clear-cut approach.
  25. THE ZOOM-LENS MODEL?:
    • THE MOST USED MODEL THAT EXPLAINS THE RELATIONSHIP BETWEEN ATTENTIONAL BREADTH AND PERCEPTION eg. predicts that as attentional breadth ^'s, perception processing decreases.
    • WAS INITIALLY TESTED AS AN EXOGENOUS CUEING PARADIGM.
    • e.g. used 8 letters in a circle. endogenously cued letters were underlined (more = a broader breadth of attention). RT was longer with broader breadths.
  26. AN EXOGENOUS CUEING PARADIGM?:
    • A BRIEFLY PRESENTED (AND PERIPHERAL) VISUAL CUE DIRECTS OUR ATTENTION TO A CERTAIN LOCATION.
    • HAVE TO RESPOND AS ACCURATELY AS YOU CAN WHEN THE TARGET APPEARS.
    • It appears at the cued location (e.g. valid) or at a non-cued location (e.g. invalid).
    • e.g. the red box is the cue and the target is a smiley face.
    • BETTER AT THE VALID TRIALS == THERE IS BETTER VISUAL PROCESSING AT THE CUED LOCATION.
  27. THE ZOOM LENS MODEL MULLER ET. AL (2003)?:
    • FMRI WAS USED TO EXAMINE HOW NARROW AND BROAD ATTENTION CHANGED THE ACTIVATION IN THE VISUAL CORTEX.
    • e.g. participant's had a broad or narrow cueing manipulation. Had to detect a blue target and RT was recorded.
    • Looked at the intensity and distribution of retinotopic activity in the PVC.
    • NARROW ATTENTION HAD MORE INTENSE ACTIVATION OVER A SMALLER REGION IN THE PVC.
  28. THE SELECTIVE SPATIAL ENHANCEMENT?:
    • older research only used tasks that had the participants process fine spatial detail. THERE'S OTHER EFFECTS (e.g. the visual pathways).
    • e.g. narrow attention effects the parvocellular pathway not magnocellular.
  29. THE SSE EXPERIMENT?:
    • USED A SHAPE INDUCER TASK TO MANIPULATE ATTENTIONAL BREADTH (e.g. had small (narrow) and big (broad) circles and ovals).
    • 80% were inducer trials;
    • 20% measured how attentional breadth effected the P&M processing in the task.
    • SPATIAL ACUITY (P) e.g. had a small gap in the shape and TEMPORAL ACUITY (M) e.g. had to detect whether the circle flickered.
    • assumed that better AC/RT meant ^perceptual sensitivity.
  30. THE SSE EXPERIMENT DATA?:
    • AB EFFECTED THE SPATIAL-GAP TASK AND NOT THE TEMPORAL-GAP TASK. It only effected the parvocellular cells.
    • This is because the main function of AB is to help with fine-spatial processing.
    • Could have used HSF'S AND LSF'S to test this.
  31. PARVOCELLULAR CORTICAL NEURONS?:
    • GOOD AT PROCESSING COLOUR AND FINE SPATIAL-DETAIL.
    • SLOWER RESPONSE (E.G. THEY CAN'T PROCESS FINE CHANGES VERY QUICKLY).
    • SMALL RF'S.
    • parvocellular has high spatial resolution (detail) and bad temporal resolution.
  32. MAGNOCELLULAR CORTICAL NEURONS?:
    • CAN'T PROCESS COLOUR BUT GOOD A PROCESSING COARSE SPATIAL DETAIL.
    • FASTER (E.G. CAN PROCESS FINE TEMPORAL DETAIL).
    • magnocellular has high temporal resolution and low spatial resolution.
    • BIG RF'S.
  33. THE SSE EXPERIMENT WITH SF'S?:
    • USED A SHAPE INDUCER TASK. HSF'S AND LSF'S WERE USED. Is the shape tilted to the L/R?
    • attention only effected the parvocellular cells (e.g. HSF'S) discrimination accuracy.
  34. THE SPATIOTEMPORAL TRADE-OFF MODEL?:
    • We know that PC have SRF'S and that MC have BRF'S and that NA maps onto the SRF'S (P) and that BA maps onto the LRF'S (M).
    • Each improves the processing of their respective counterpart. Therefore, there's a tradeoff (e.g. one sacrifices a bit of itself to use the other).
    • MOUNTS AND EDWARDS (2017) USED EXOGENOUS CUEING TO CHANGE AB AND FOUND THAT NA ^SA AND BA ^TA (e.g. which improve their respective P&M processing pathway).
  35. THE OUTCOMES OF ALL THREE?:
    • The ZLM argues that NA helps visual processing more than BA.
    • The SSEM argues that changes in attentional breadth only effect the parvocellular cells.
    • The STTOM argues that NA improves the PC and BA improves the MC.
  36. THE METHODOLOGICAL CONSIDERATIONS?:
    • EXOGENOUS + ENDOGENOUS ATTENTION MIGHT HAVE DIFFERENT IMPACTS ON THE P&M CELLS.
    • changing the task difficulty can change the BOA.
    • e.g. perceptual load (e.g. low = BA and high = NA) AND cognitive load ((e.g. high = BA and low = NA).
  37. pt.3.2.
  38. THE FACTORS THAT EFFECT FACE RECOGNITION?:
    • STIMULUS QUALITY (e.g. lighting, expression and blur etc.)
    • EYE LEVEL EFFECTS AND INPUT (e.g. age and age-related macular degeneration).
    • BRAIN LEVEL EFFECTS (e.g. prospagosia, "super-recognizers" and genes).
    • 60% hertiable and a big % of this is not shared with object recognition genes and general IQ.
    • THE ENVIRONMENT AND EXPERIENCE (e.g. other-race effects).
  39. STIMULUS VARIABILITY?:
    • will use two side-by-side photos but in real life faces can be viewed from different views, lighting (+expressions and hair-styles etc).
    • They also use high-quality images e.g. in an 8-person line-up (degraded images) participants correctly identified 30% of the people.
  40. THE EYE-LEVEL EFFECTS?:
    • THE MOST COMMON PROBLEM IS UNCORRECTED REFRACTIVE ERROR (esp. in old people).
    • eg myopia (nearsightedness, hyperopia (farsightedness), presbyopia (age related) and astigmatism.
  41. PROSOPAGNOSIA?:
    • ACQUIRED (e.g. lose the ability to recognize faces. Result of a head-injury/stroke)
    • CONGENITAL (e.g. recognition deficits with no other vision/brain problems). 
    • SUBTYPES e.g. face-specific/not, heritable and different components are effected.
  42. FACES ARE HOLISTICALLY PROCESSED WHEREAS OTHER OBJECTS ARE NOT.
  43. SUPER-RECOGNIZERS?:
    1-2%. RECOGNIZE PEOPLE AFTER MANY YEARS AND OUT OF CONTEXT e.g. are used to help police match suspects from CCTV.
  44. "OTHER-GROUP" OR "OTHER-RACE" EFFECTS?:
    • IT'S HARDER TO RECOGNIZE FACES THAT AREN'T SIMILAR TO OURS.
    • GROUPS WITH LESS EXPERIENCE MIGHT SHOW BIGGER EFFECTS (but there's no direct correlation between ORE and experience).
    • age the experience is acquired is important (e.g. early childhood). 9MTH-old's are favouring faces.
    • asymmetries (e.g. white people show the effect but asian/black don't. Could be to do with other factors like power and SES).
    • THESE CATEGORIES AREN'Y ALWAYS SALIENT (eg. the university effects vanished when race effects were also included).
  45. HOW CAN WE IMPROVE FACE RECOGNITION?:
    • AVERAGE LOW QUALITY IMAGES (e.g. it removes problems with lighting and blur)
    • HELPING PEOPLE WHO HAVE EYE PROBLEMS AND PROSOPAGNOSIA.
    • TRAINING AND AWARENESS (e.g. passport-officers who have been trained are no better than students with no training).
    • e.g. prosopagnosia child was trained to recognize family member's features. 
    • Had ^fixations to internal features for both familiar and unfamiliar faces after this.
    • individuation training can <ORE and implicit bias.
    • Even experimenters just telling the participants to individuate can help.
    • USING CROWD ANALYSIS AND SWARM INTELLIGENCE.
  46. VALENTINE (1991)-FACE-SPACE?:
    • FACES ARE ENCODED ON A NO. OF DIMENSIONS AS POINTS AND VECTORS THAT ARE RELATIVE TO A PROTOTYPE/NORM FACE.
    • was originally used to explain race-effects. +faces that are more unusual are hard to recognize because they're further from the centre.
    • is there one norm or heaps? They might be temporarily formed based on the task.
  47. BRUCE AND YOUNG (1986)?:
    HAS VARIABLE AND LESS VARIABLE ASPECTS OF FACE RECOGNITION?
  48. pt.4
  49. VISUAL ATTENTION?:
    • THE MECHANISM THAT LETS US SELECTIVELY PROCESS VISUAL INFORMATION IN OUR ENVIRONMENT.
    • THERE'S DIFFERENT TYPES (e.g. spatial, object-based and feature-based).
  50. THE POSNER CUEING PARADIGM?:
    • CAN MANIPULATE WHERE THEIR ATTENTION IS ALLOCATED.
    • A VISUAL CUE DIRECTS THEIR ATTENTION TO A CERTAIN LOCATION.
    • HAVE TO PRESS A KEY AS SOON AS THE TARGET IS SEEN. (e.g. a shape) OR TO DISCRIMINATE A TARGET (e.g. E vs. F).
    • THE TARGET WILL EITHER APPEAR AT THE CUED LOCATION. (e.g. the valid trial) OR THE NON-CUED LOCATION (e.g. the invalid trial).
  51. QUANTIFYING THESE ATTENTIONAL EFFECTS?:
    • RT'S ARE FASTER FOR THE VALID TRIALS.
    • THIS IS EVIDENCE THAT THE ATTENTIONAL SPOTLIGHT HAS BEEN SHIFTED TO A CUED LOCATION.
    • The AS is the region over which attentional resources are allocated.
    • CAN QUANTIFY THIS WITH A CUEING SCORE ~ (e.g. the difference in RT between valid and invalid trials).
  52. HOW TO SET UP A CUEING PARADIGM FOR EXOGENOUS CUEING?:
    • THE CUE NEEDS TO BE A SALIENT STIMULUS (e.g. the red frame).
    • PERIPHERAL.
    • IT NEEDS TO BE PREDICTIVE OF THE TARGET'S LOCATION. (50% valid & 50% are invalid).
    • HAS A SHORT CUE-TARGET INTERVAL (e.g. 100MS).
    • GET INHIBITION OF RETURN AT LONG CUE-TARGET INTERVALS (e.g. 300MS).
  53. THE INHIBITION OF RETURN (E.G. THE IOR)?:
    • HAPPEN WITH EXOGENOUS CUES AT LONG CUE-TARGET INTERVALS (eg 300MS).
    • VALID TRIAL > INVALID TRIAL RT.
    • Attention is shifted to the cued location.
    • Because the time is too long we disengage from the cued location and then attend to the non-cued location instead.
  54. HOW TO SET UP A CUEING PARADIGM FOR ENDOGENOUS CUEING?:
    • THE CUE IS A CENTRAL AND SYMBOLIC CUE (e.g. an arrow).
    • THE CUE PREDICTS THE TARGET'S LOCATION (e.g. 75% valid and 35% invalid).
    • A LONGER CUE-TARGET INTERVAL IS NEEDED SO THEY CAN INTERPRET THE CUE (e.g. 300MS).
    • Jonides (1981) argued that central cues always elicit endogenous attention.
    • BUT CENTRAL CUES CAN ALSO ELICIT INVOLUNTARY ATTENTION. (E.G. GAZE).
  55. GAZE?:
    • THE FACE EITHER LOOKS TO THE LEFT OR THE RIGHT.
    • THE TARGET IS A SNOWMAN. Participants have to detect him as fast as they can.
    • TOLD THAT THE GAZE DOES NOT PREDICT THE SNOWMAN'S LOCATION.
    • THERE WERE STILL CUEING EFFECTS (even though the cue was non-predictive.).
  56. IS "GAZE" SPECIAL?:
    • GAZE INFORMATION IS BIOLOGICALLY RELEVANT.
    • (e.g. alert, gauges other people's intentions and goals and used in conversations).
    • BUT NON-PREDICTIVE CUES ALSO HAD THIS EFFECT. THEY ARE MANUFACTURED STIMULI THAT WE ARE EXPOSED TO A LOT.
    • USING THEM IN ENDOGENOUS CUEING MIGHT BE PROBLEMATIC.
  57. HOW CAN WE ELICIT PURE ENDOGENOUS ORIENTATING?:
    • CAN'T USE ARROWS.
    • CAN USE NUMBERS OR COLOURS THAT ARE ASSOCIATED WITH CERTAIN SPATIAL LOCATIONS (e.g. 1 = right, 2 = top etc.).
    • TRAINING IS NEEDED TO THEY CAN LEARN THIS RELATIONSHIP.
    • Good because colours and numbers are not intrinsically linked to spatial locations (like e.g. arrows and gazes are).
  58. SPATIAL RESOLUTION?:
    • THE ABILITY TO SEE FINE DETAIL.
    • IS ENHANCED BY BOTH EXOGENOUS AND ENDOGENOUS ATTENTION.
  59. YESHURUN AND CARRASCO (1999)?:***SLIDE 35.
    • TESTED ATTENTION AND SPATIAL RESOLUTION WITH DIFFERENT TASKS (e.g. which side of the square has a gap?; was the line continuous or broken? and; was the upper line displaced to the L/R of the bottom line?).
    • CUED (e.g. a green horizontal line) = ABOVE THE TARGET LOCATION. NEUTRAL = IN THE MIDDLE.
    • TRANSIENT ATTENTION BECAUSE THE CUE WAS ALWAYS VALID.
    • PERFORMANCE WAS GOOD IN THE CUED CONDITION (at big eccentricities). Thus, endogenous cueing also effects our performance on spatial resolution tasks.
  60. TEMPORAL RESOLUTION?:
    • THE ABILITY TO PERCEIVE FINE TEMPORAL DETAIL (E.G. A FLICKER).
    • IS IMPAIRED BY EXO. ATTENTION AND ENHANCED BY ENDOGENOUS ATTENTION.
  61. YESHURAN AND LEVY (2003)?:
    • TESTED ATTENTION AND TEMPORAL RESOLUTION.
    • Participants had to determine whether two discs were presented with a gap in the middle or whether they were presented continuously.
    • HAD A CUED CONDITION (e.g. was a horizontal bar) AND A NEUTRAL CONDITION
    • THEIR PERCEPTUAL SENSITIVITY WAS LOWER IN THE CUED CONDITION.
    • ATTENTION CAN IMPAIR OUR PERCEPTUAL PERFORMANCE.
    • Why does exogenous attention enhance SR and impair TR? Can be explained with P&M cells. MIGHT ENHANCE P-CELLS.
  62. HEIN, ROLKE AND ULRICH (2006)?:
    • EXAMINED HOW ENDOGENOUS ATTENTION EFFECTED TEMPORAL RESOLUTION.
    • USED A VALID AND INVALID ARROW CUE.
    • Participant's had to decide which dot had appeared first (e.g. the L/R one).
    • IT ENHANCED ATTENTION.
  63. pt.4.2.
  64. THE MODULATE VISUAL PATHWAYS (MVP) EXPERIMENT?:
    • WE HAVE MORE M-CELL INPUT AND LESS P-CELL INPUT FOR VISUAL PERCEPTION NEAR THE HANDS.
    • experiment = have to hold their hands on the monitor while doing the task.
    • HAS A TEMPORAL-GAP DETECTION (e.g. a quick disappearence.) AND A SPATIAL-GAP TASK (e.g. a gap in the circle).
    • WERE WORSE AT THE SPATIAL CONDITION WITH THEIR HANDS NEAR (+overall.) AND BETTER AT THE TEMPORAL CONDITION WITH THEIR HANDS NEAR.
    • DID WORSE WITH THEIR HANDS NEAR AT HSF'S (They did a lot better at LSF'S).
  65. WHY DOES THIS HAPPEN?:
    • Each hand has an attentional spotlight.
    • When they're both up the spotlights merge into one big spotlight. A LS enchances TA and impairs SA AND A SS enhances SA and impairs the TA.
  66. THE OSM?:***SLIDE25.
    • TEMPORALLY-TRAILING MASK IMPAIRS THE PERCEPTION OF A TARGET. 
    • e.g. has a simultaneous mask-offset (target is visible with the mask.) and delayed mask-offset (the target is presented first).
    • MASKING MAGNITUDE = IS THE DIFFERENCE BETWEEN THE SIMULTANEOUS AND DELAYED MASK-OFFSET CONDITIONS.
    • E.G. FOUR CIRCLES WITH GAPS AND THEN FOUR DOTS AROUND THE TARGET.
  67. THE OBJECT-UPDATING ACCOUNT FOR WHY OSM HAPPENS?:
    • THE TARGET'S OBJECT FILE IS CREATED.
    • IT THEN IT GETS UPDATED TO REFLECT THE FOUR-DOT MASK.
    • OSM HAPPENS BECAUSE THE BRAIN THINKS THAT THE TWO OBJECTS (the target and the mask) ARE ONE (e.g. the mask).
    • This prevents the target from being consciously perceived.
    • IF THIS IS TRUE THEN =
    • The same physical information should be processed differently. (which depends on whether it is perceived as a continuous object or not).
  68. EVIDENCE***RE-WATCH?:
    • 1. The same physical information should be processed differently. (Which depends on whether it is perceived as a continuous object or not).
    • 2. The manipulations that cause the brain to treat them as the same object would lead more masking (and vice versa).
  69. 1. LLERAS AND MOORE (2003)?:
    • HAD LOTS OF C'S AND PARTICIPANTS HAD TO FIND THE GAP.
    • HAS SHORT ISI (short and move as one).
    • HAS LONG ISI (long and did not move together = a different object).
    • FOUND THE MASKING MAGNITUDE.
    • MASKING ONLY HAPPENED IN THE DELAYED OFFSET SHORT ISI CONDITION. THE MASK WAS SEEN AS A CONTINUING OBJECT WHICH = OBJECT UPDATING
    • (Long ISI condition = it was seen as a new object that appeared after the target).
  70. 2. LLERAS AND MOORE (2005)?:
    • HAD RED C AND RED MASK, GREEN C AND GREEN MASK, GREEN MASK AND RED C AND GREEN C AND RED MASK.
    • Same colour would make the brain think that they belonged to the same object (& vice versa). THIS IS WHAT THEY FOUND.
    • THERE WAS MORE MASKING IN THE SAME COLOUR CONDITION AND LESS WHEN THEY LOOKED LIKE DISTINCT OBJECT.
  71. ATTENTION AND THE OSM?:
    • USED SET-SIZE TO OPERATIONALIZE THE EXTENT TO WHICH THEIR ATTENTION WAS FOCUSED ON THE TARGET. 
    • USED 1-16.
    • Believed that we wouldn't get masking if their attention was completely focused vs. distributed.
    • HAD WORSE % CORRECT WITH BIGGER SET-SIZES.
    • THERE WAS A CEILING EFFECT WHICH MIGHT HAVE CREATED THE INTERACTION.
    • Another experiment (that used 4-16) found a smaller interaction.
  72. DO DIRECT ATTENTIONAL MANIPULATIONS EFFECT THE OSM MAGNITUDE?:
    • E.G. 1. ATTENTIONAL CUEING.
    • 2. MANIPULATING THE SIZE OF THE ATTENDED REGION (breadth re-scaling).
    • MANIPULATED CUES.
    • DID NOT FIND EVIDENCE THAT ATTENTION (when mediated by cues.) EFFECTED THE OSM MAGNITUDE.
    • Did effect performance though which means that the attentional manipulation was working.
  73. pt.5
  74. NEUROPSYCHOLOGICAL CASES?:
    • WHEN AN INDIVIDUAL OR A GROUP WITH BRAIN DAMAGE ARE STUDIED.
    • HELPS US TO UNDERSTAND WHAT COGNITIVE PROCESSES ARE LINK WITH WHAT NEURAL STRUCTURES.
    • There's a focus on diagnosis and rehabilitation where it's possible.
    • CAN ASK QUESTIONS LIKE E.G. 1. The degree of it's functional specialization?
    • 2. Is process "A" mediated by area "B?"
    • 3. Are processes "A" and "B" distinct or in the same region?
    • e.g. some patients have face perception deficits but not object perception deficits. Does this mean that face and object recognition are distinct processes?
  75. THE MIXED EVIDENCE FOR OBJECTS AND FACES?:
    • SOME HAVE FACE BUT NOT OBJECT DEFICITS.
    • e.g. two patients with prosopagnosia could recognize objects but one couldn't.
    • CHILD PATIENT L.G HAD IMPAIRMENT ON BOTH.
    • ADULT PATIENT N.S COULDN'T INTEGRATE FACES AND OBJECTS INTO A WHOLE.
  76. SINGLE VS. DOUBLE DISSOCIATION?:
    • SINGLE = process "A" is impaired when area "A" is damaged and "B" works.
    • DOUBLE = process "A" is impaired when area "A" is damaged and "B" works, AND process "B" is impaired when area "B" is damaged and process "A" works.
  77. TMS?:
    • USE MAGNETIC FIELDS (via a metal coil) TO STIMULATE THE CELLS IN A CERTAIN REGION.
    • IT CAUSES A TEMPORARY IMPAIRMENT IN THAT REGION.
    • CAN ALSO BE REPETITIVE (E.G. RTMS).
    • eg. TMS effected semantic processing in the anterior cortex and that TMS effected phonological processing in the posterior cortex.
  78. SYNAESTHESIA?:
    • THE PERCEPTUAL PHENOMENON IN WHICH ONE SENSATION TRIGGERS ANOTHER SENSATION (e.g. they "taste" shape or "hear" colours).
    • THE MOST COMMON IS COLOUR-GRAPHEME.
    • MOST ADULT SYNAESTHETES ARE SURPRISED WHEN THEY LEARN THAT IT'S NOT A COMMON THING.
  79. THE DEVELOPMENT OF SYNAESTHESIA?:
    • GENETICS AND DEVELOPMENTAL (e.g. incomplete synaptic pruning).
    • THIS COULD BE WHY GRAPHEME-COLOUR IS SO COMMON.
  80. THE EXPERIMENT WITH SYNAESTHETES AND NORMAL PARTICIPANTS?:
    THEY HAD TO RELATE A COLOUR TO A WORD (These were either happy or sad.). MOST OF THE COLOURS WERE EXACTLY THE SAME.
  81. HOW DO WE KNOW IF SYNAESTHESIA IS REAL?:
    CONSISTENCY; BEHAVIOURAL EFFECTS (e.g. accuracy and RT) AND NEUROIMAGNG.
  82. WHAT ARE THE IMPLICATIONS OF BIG ATTENTIONAL BREADTHS?:
    • BETTER AT RECOGNIZING FACES.
    • ARE BETTER AT EXTRACTING GLOBAL INFORMATION.
    • CAN MAKE US SUSCEPTIBLE TO PERIPHERAL AND TASK IRRELEVANT EMOTIONAL STIMULI.
  83. MATTINGLEY ET. AL (2001)?:
    • 15 COLOUR-GRAPHEME SYNAESTHETES VS. NON-SYNAESTHETIC CONTROLS.
    • WANTED TO TEST THEIR CONSISTENCY.
    • They were given 150-items with letters, no.'s and words. They had to describe the experience. DID THE SAME EXPERIMENT 3 MONTHS LATER (C = 1M).
    • THE SYNAESTHETES WERE WAY MORE CONSISTANT.
  84. THE STOOP TASK (THE BEHAVIOURAL EFFECTS)?;
    • CONGRUENT = THE SAME COLOUR AND WORD ASSOCIATION & INCONGRUENT = NOT.
    • RT WAS FASTER FOR THE CONGRUENT TRIALS AND SLOWER FOR THE INCONGRUENT TRIALS IN SYNAESTHETES. Controls were a horizontal line. (didn't matter).
  85. NEUROIMAGING?:
    • THE COLOUR AREA RESPONDS IN "COLOURED" SYNAESTHETES.
    • MIGHT BE DISTINCT FROM COLOUR IMAGERY.
    • THERE ARE STRUCTURAL DIFFERENCES IN THE BRAIN'S OF SYNAESTHETES AND NON-SYNAESTHETES.
  86. WHAT IS THE COGNITIVE PROFILE OF THE SYNAESTHETE?:
    • THEY HAVE ENHANCED SENSORY PROCESSING.
    • THEY HAVE BETTER MEMORY.
    • THEY ARE MORE LIKELY TO HAVE ARTISTIC PURSUITS AND BE MORE CREATIVE.
    • MORE "OTE" AND FANTASIZING. LOWER ON AGREEABLENESS.
  87. MACRAE AND LEWIS (2002)?:
    • TESTED WHETHER A BIG ATTENTIONAL BREADTH IS GOOD FOR FACE DETECTION
    • WATCHED A VIDEO OF A ROBBERY.
    • 3 CONDITIONS
    • e.g. a global navon task, a local navon task and an unrelated task).
    • THEY THEN SAW 8 FACES AND HAD TO DETECT WHICH ONE WAS THE ROBBER.
    • GN = 83%, CONTROL = 60% AND LN = 30%. (sig.)
  88. CHONG AND TREISMAN (2005).
    • WANTED TO SEE WHETHER SEARCH STYLE HAD AN EFFECT.
    • DID A SERIAL SEARCH (e.g. which one doesn't have a gap. Harder)
    • OR A PARALLEL SEARCH (e.g. which one has the gap).
    • THEN DID A MEAN DISCRIMINATION TASK (e.g. what was the average size) OR A MEMBER IDENTIFICATION TASK (e.g. what size was here?).
    • RT WAS SLOWER FOR ALL SERIAL (e.g. the focused) SEARCHES.
    • The mean was considered to be "bigger" in the serial searches & the member was considered to be "bigger" in the parallel searches.
  89. NOTEBAERT ET. AL (2013)?:
    TRAINED PARTICIPANTS TO ASSOCIATE CERTAIN COLOURS WITH AN ELECTRIC SHOCK
  90. ATTENTIONAL RESIZING?:
    • ARE WE ABLE TO SET A BREADTH OF SPATIAL ATTENTION AND RESCALE IT IN A RAPID AND EFFICIENT FASHION. (e.g. driving).
    • Are we equally good at expanding vs. contracting our attention?
    • CAN BE MANIPULATED VIA TASK DEMANDS AND CHANGING STATES. (emotions).
    • ITS WIDELY BELIEVED THAT WE PREFER A BROAD BREADTH OF ATTENTION. Does this mean we are better at expanding than contracting our attention?
  91. IS THERE A GLOBAL PRECEDENCE EFFECT IN ATTENTIONAL RESIZING?:
    • USED THE NAVON TASK.
    • HAS A FIXATION CROSS, STIMULUS PRESENTATION AND A RT.
    • 3 CONDITIONS (neutral (50/50), global (80/20) & local (80/20)). The second and third conditions were randomized.
    • GPRT = LRT IN THE NEUTRAL BLOCK - GRT IN THE NEURTRAL BLOCK. ^+NO.'S = BETTER ON GLOBAL TRIALS.
    • CONTRACTION COST = LRT IN THE GLOBAL BLOCK - GRT IN THE GLOBAL BLOCK. ^+NO. = SLOWER FROM BROAD TO NARROW.
    • EXPANSION COST = GRT IN THE LOCAL BLOCK - LRT IN THE LOCAL BLOCK. ^NO. = SLOWER GOING FROM NARROW TO BROAD.
  92. DATA?:
    • There was a GPE in the neutral conditions. There was no asymmetry in the EVS.C conditions. 
    • The participants had just adapted to the task.
    • WOULD BE GOOD TO TEST IF ASYMMETRY CHANGES WITH MOTIVATION OR OUR INDIVIDUAL DIFFERENCES.
    • EVEN THE REAL-WORLD TASKS (E.G. DRIVING).
  93. CONSTRUCTS VS. OPERATIONALIZATIONS?:
    • CONSTRUCT = A THEORETICAL CONCEPT. 
    • (e.g. the basis of research questions).
    • OPERATIONALIZATIONS == THE METHODS THAT ARE USED TO MANIPULATE AND MEASURE THESE CONSTRUCTS
    • (e.g. These are the parameters of the experiment).
    • Always look at the gaps between these when critiquing an experiment.
  94. HOW IS ATTENTIONAL BREADTH OPERATIONALIZED IN THE LITERATURE?:
    • NAVON; FLANKER AND THE SPATIAL DISTRIBUTION OF THE IOR.
    • But are they all testing the same thing?
  95. TESTING ALL THREE?:
    • NAVON. Measured using the GPS (e.g. RT to local targets - RT's to global targets) 
    • FLANKER. Varied the distance between the middle and distracted targets. 
    • RT'S to local target = RT to global target. AND;
    • HUTTERMAN BREADTH-OF-ATTENTION TEST.
    • Had flashes. (e.g. How many grey squares were on the L/R?.). Varied the distance between the two configurations. Measured accuracy.
  96. DATA?:
    • HAD TEST-RETEST RELIABILITY.
    • THE GLOBAL PRECEDENCE EFFECT WAS FOUND IN THE NAVON; RT/ACC. < WITH ^DISTANCE IN THE OTHER TWO.
    • HUTTERMAN TEST WAS AN OUTLIER.
Author
e0dunne
ID
343066
Card Set
PSYC3015PT.2
Description
PSYC3015PT.2
Updated