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Spring EPPP Practice > Stats > Flashcards

Flashcards in Stats Deck (96)
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1

When is a MANOVA used

With one or more independent variables and two or more dependent variables

2

Between subjects versus Within subjects designs
And MIXED

Between-subjects (or between-groups) study design: different people test each condition, so that each person is only exposed to a single user interface.
Within-subjects (or repeated-measures) study design: the same person tests all the conditions (i.e., all the user interfaces).
MIXED study design utilizes both BETWEEN GROUPS subjects AND WITHIN GROUPS variables

3

SEM Standard Error of Measurement in creating Confidence Intervals

68% confidence interval is the score given + or - the SEM
95% confidence interval is the given score + or - TWICE (x 1.96) the SEM
99% confidence is the given score + or - 2 1/2 times SEM (x 2.58)

4

A test developer is calculating a test's _____ when dividing the number of true positives ID by the test by the number of true positives PLUS false negatives

Sensitivity

5

The WAIS-IV’s Global Ability Index (GAI) is based on subtests for which of the following Indexes?

Verbal Comprehension and Perceptual Reasoning

6

Taylor-Russell Tables provide an estimate of the incremental validity of a test.

The greatest validity comes with a selection ratio of __ and a base rate of __.
Need BASE RATE, SELECTION RATIO, and VALIDITY COEFFICIENT

7

What happens to the SEM when sample size increases?

- SEM decreases as sample size increases.

8

Test Unfairness

Occurs when for 2 groups (ie men /women):

Criterion-related Validity is SAME
Criterion scores are SAME/SIMILAR, but
Predictor Scores are significantly DIFFERENT

9

Rancho Los Amigos Level of Cognitive Functioning Scale

A patient who receives a rating of Level V (Confused – Inappropriate Response) is confused but non-agitated, responds to simple commands, gives random or fragmented responses to complex stimuli, has impaired memory and selective attention, and is unable to retain new information.

10

Co-efficient of stability

Measures reliability of test across 2 occasions with separate examinees

11

Co-efficiency of Internal Consistency

Measures the reliability of a factor that fluctuates in intensity or severity over time

12

Test Bias: What does Slope Bias describe?

When a predictor's validity co-efficient differs for different groups

13

Wonderlic Personelle Test - R evaluates what?

A brief test of mental ability for adults.

14

Solomon 4 Group Design

Evaluates the effects of pre-testing

15

SAT Reasoning Test's purpose

Predict the college success of high school seniors

16

What type of test is the EPPP

A measure of basic psychology knowledge

17

Multiple Regression Analyses advantages over ANOVA

- Eliminates need for 2-stage analysis involving Global Significance Test followed by "fine grain" significance tests
- Not limited to categorical variables
- Enables researchers to determine if adding additional independent variables affects dependent variable beyond the effects found by the initial independent variables

18

Rational Economic model of decision making views decision makers as attempting to make

Optimal decisions

19

3 Components of a Needs Assessment

Organization Analysis, Task Analysis, and Person Analysis

20

Example of a point-biserial correlation

pregnant or not with multiple item stress test

21

What are you finding out about a predictor when you divide the number of (true positives) by the number of (true positives plus false negatives)

A predictor's SENSITIVITY

22

A psychologist that is testing people would likely find that in comparison with people with a low need for achievement, people with a high need for achievement would prefer which level of task difficulty?

MODERATE difficulty

23

Spearman- Brown formula is used for what?

Reliability coeffecient- To estimate the effects of increasing or decreasing the length of a test on it's reliability coefficient RANKS

24

What kind of distribution has a mean that is less than the median and a median that is less than the mode?

Negatively Skewed
Don't forget left (lower) and right (higher)

25

Canonical Correlation

IE: when using scores on 8 subscales of a test to predict the scores on 5 subscales of another test

26

Why would you chose a MANOVA over 2 ANOVAs?

Control for experimentwise error rate; see which factor(s) are truly important; may reveal differences that aren't apparent when doing them separately.

27

Moderator vs Mediator variable

A moderator variable effects the direction or strength of the relationship
A mediator variable explains the relationship - HOW or WHY

28

Understand confidence intervals and relationship to SE of measurement

68% confidence interval would be the raw score plus and minus (+ and -) the SE of the measurement

29

In an ANOVA that is comparing the effect of 4 individual variables on 1 dependent variable. What is a significant F value?

When it is greater than 1.0. OR the when the numerator is greater in a ratio of mean square between (numerator) over mean square within (denom)

30

High scores on scales 4 and 9 on the MMPI would likely look like what type of behavior?

Antisocial behavior and impulsivity
(4= psychopathic deviant; 9=hypomania)