# AP Psychology Vocab 5

 Validity the ability of a testto predict future performance Population the group of subjects that a sample is drawn from Variance a measure of how far the actual result is from the expected value Scatterplot a graph containing a plot of points that analyzes the correlation of twofactors; the scale being from -1 to 1 and the slope of the line of bet fitbeing the correlation Type I error A false positive confusing a hypothesis when infact the null hypothesis is correct Type 2 error A false negative rejecting a true experimental hypothesis z score (standard score) a measure in standard deviations of how far a score falls from the mean range the difference between the highest and lowest scores in a distribution Absolute Threshold the minimum stimulation needed to detect a particular stimulus 50% of the time Depth Perception the ability to see objects in three dimensions although the images that strike the retina are 2-D; allows us to judge distance Binocular Cues depth cues, such as retinal disparity and convergence, that depend on the use of two eyes Just Noticeable Difference (difference threshold) the minimum difference between two stimuli required for detection 50% of the time Binocular Disparity – a binocular cue for perceiving depth; by comparing images from the two eyeballs, the brain computes distance – the greater the disparity (difference) between the two images, the closer the object Perceptual Set a mental predisposition to perceive one thing and not another Opponent Process Theory the theory that humans see colors in contrasting pairs (red-green, yellow-blue, andblack-white) because of opponent processing cells in the thalamus Cone retinal receptor cells that are concentrated near the center of the retina and that function in daylight or in well-lit conditions. The cones detect fine detail and give rise to color sensations Lens the transparent structure behind the pupil that changes shaped to help focus images on the retina Retina the light-sensitive inner surface to the eye, containing the receptor rods and cones plus layers of neurons that begin the processing of visual information Retinal Disparity a binocular cue for perceiving depth; by comparing images from the two eyeballs, the brain computes distance – the greater the disparity (difference) between the two images, the closer the object Afterimage an optical illusion that occurs after looking away from a direct gaze at an image Authorc.shortstop17 ID79778 Card SetAP Psychology Vocab 5 Description5th list of 50 or however many are left Updated2011-04-22T03:08:52Z Show Answers