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)

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