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Research quiz 2
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An operationalization should be
VALID
Construct validity
Criterion validity
RELIABLE
Two Types of Reliability
Reliable measure: stable measure
Reliable results: stable finding across different measures or differentoperationalizations
Failure to allow for falsifiability
Is the major reason that Freud is not too much in favoramong academic psychologists
Type I error
reject null hypothesis when it is true
Type II error
Accept the null hypothesis when it is false
Power
Rejecting a false null hypothesis
The probability that we will detect an effect if an effect actually exists
Sensitivity of a study
The ability to detect an effect even if the effect is small
Ceiling effects
All your test scores are high
Floor effects
all your test scores are low
parsimonious
avoids unnecessary concepts
how do we avoid type II errors?
Look at array of data
How to test the idea or theory
Be concrete (operational)
Say - in advance - what would prove you wrong
FALSIFIABILITY – hallmark of modern scienceSays Karl Popper
The theory is parsimonious
qualitative methods go along with
idiographic
quantitative methods go along with
nomothetic
qualitative data
words
Some times code into categories
Often count what you code
Quantitative data
Numbers
they communicatea lot of information with a few symbols
NEED TO USE NUMBERS WISELY (donʼtdecontextualize
kind of quantitative data
NOMINAL
CONTINUOUS
nominal data
Categorical
• Examples
• Yes/no
• Male/female
• Car color
• Type of pet
Continuous data
ALONG A CONTINUUM
• Shortest to tallest
• Poorest to richest
• Least to mos
how to make continuous data into categorical data
Step 1
: you have rating of best = 10to worst = 1)
Step 2
: you make these good and bad (e.g.,good = 10 to 6; and bad = 5 to 1
can you make Categorical data into continuous data?
NO!
Types of continuous data
• Ordinal (in order)
• Interval (in order and same differences)
• Ratio (in order, same differences and realzero point)
Author
mdawg
ID
307363
Card Set
Research quiz 2
Description
Research quiz 2
Updated
2015-09-05T03:25:54Z
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