Stats

Question 1

External validity

Answer 1

Generalizability

Question 2

Internal validity

Answer 2

Causality

Question 3

Construct validity

Answer 3

Did we measure the right thing

Question 4

Random assignment

Answer 4

Internal validity - randomly assign people to different groups (test - control)

Question 5

Random selection

Answer 5

External validity - select randomly from a population/sampling frame

Question 6

ANOVA

Answer 6

Analysis of Variance

Question 7

Main effect

Answer 7

One thing has an effect on the other

Question 8

Interaction effect

Answer 8

One variable is dependent on the other, a combination of things has an influence on sth else

Question 9

Reliability of a measure

Answer 9

The extent to which it is free of random error (fluctuating errors, such as amount of sleep before a test)

Question 10

Validity of a measure

Answer 10

The ectent to which it is free of systematic error (dyslexia)

Question 11

Mean

Answer 11

Gemiddelde, deel + elkaar en dan gedeeld door geheel

Question 12

Mode

Answer 12

Getal dat het meest voorkomt

Question 13

Median

Answer 13

Ordinal: the middle number

Question 14

IQR

Answer 14

Ordinal: Q3 - Q1

Question 15

Range

Answer 15

Hoogste min laagste

Question 16

Ordinal

Answer 16

categories, rank order, strongly agree

Question 17

Nominal

Answer 17

Categories, values are names or labels, male or female

Question 18

Interval

Answer 18

Ranges

Question 19

Interpretive data collection

Answer 19

Interviews, observations

Question 20

interpretive research designs

Answer 20

case research, action research, ethnography, phenomenology

Question 21

Experimental design: two-group designs
1. pretest-posttest control group design
2. post-test only control group

Answer 21

1. randomly assigned whether you get an intervention or not (placebo)
2. participants get randomly assigned to either receive an intervention or not, and then the outcome of interest is measured only once after the intervention takes place in order to determine its effect.

Question 22

hybrid designs
1. randomized block design
2. solomon four-group design
3. switched replication design

Answer 22

1. The treatments are randomly allocated to the experimental units inside each block
2. everyone gets assigned one out of 4 groups, all groups have different combinations of either pretest or treatment or both or none.
3. In the first phase of the design, both groups are pretests, one is given the program and both are posttested. In the second phase of the design, the original comparison group is given the program while the original program group serves as the “control”.

Question 23

Face validity

Answer 23

Intuitively asessing wether your measure is measuring your construct

Question 24

Convergent validity

Answer 24

different measures that measure the same constructs are compared, to make sure that you’re measuring the right thing

Question 25

Discriminant validity

Answer 25

Measures how non-related different measures are, to reflect that your measure is not measuring a different variable.