PSYCH 412 EXAM 1 QUESTIONS WITH VERIFIED
ANSWERS
Psychological tests typically try to detect individual differences on a construct. (True or
False) - Answers - True
A test where most scores cluster around the low end of the scale is negatively skewed.
(True or False) - Answers - False
Ranking Netflix shows from most to least favorite is a(n) (ordinal, interval, or ratio) scale.
- Answers - Ordinal
A regression model with 1 predictor and 1 criterion variable is the same as a
correlational analysis. (True or False) - Answers - True
Determining for whom a test score predicts an important outcome is an example of
(mediation or moderation). - Answers - Moderation
Moderation - Answers - when/under what conditions/ for whom
Mediation - Answers - why (through what mechanism)
95% confidence interval vs 68% - Answers - 95% accounts for more error (wider
number range)
Reliability - Answers - -stability, repeatability, consistency & clarity
-observed score reflects person's true score
R-square (R2) - Answers - percentage of variance in the criterion accounted for by the
model
e.g., R2=.30 indicates that 30% of the variance in the criterion is "explained" by the set
of predictors chosen
Multiple Regression - Answers - - unique but relevant
-used for multiple predictors and a criterion
- want a parsimonious set of predictors
In models where there is 1 predictor and 1 criterion.. - Answers - regression is the exact
same as correlation
Importance of test content for measuring a construct - Answers - - content validity
(content needs to reflect what you want to measure)
- clear and appropriate operational definition
ANSWERS
Psychological tests typically try to detect individual differences on a construct. (True or
False) - Answers - True
A test where most scores cluster around the low end of the scale is negatively skewed.
(True or False) - Answers - False
Ranking Netflix shows from most to least favorite is a(n) (ordinal, interval, or ratio) scale.
- Answers - Ordinal
A regression model with 1 predictor and 1 criterion variable is the same as a
correlational analysis. (True or False) - Answers - True
Determining for whom a test score predicts an important outcome is an example of
(mediation or moderation). - Answers - Moderation
Moderation - Answers - when/under what conditions/ for whom
Mediation - Answers - why (through what mechanism)
95% confidence interval vs 68% - Answers - 95% accounts for more error (wider
number range)
Reliability - Answers - -stability, repeatability, consistency & clarity
-observed score reflects person's true score
R-square (R2) - Answers - percentage of variance in the criterion accounted for by the
model
e.g., R2=.30 indicates that 30% of the variance in the criterion is "explained" by the set
of predictors chosen
Multiple Regression - Answers - - unique but relevant
-used for multiple predictors and a criterion
- want a parsimonious set of predictors
In models where there is 1 predictor and 1 criterion.. - Answers - regression is the exact
same as correlation
Importance of test content for measuring a construct - Answers - - content validity
(content needs to reflect what you want to measure)
- clear and appropriate operational definition
