Independent group design

Question 1

Independent group design

Answer 1

Each participant is tested on one condition

Question 2

3 types of independent group designs

Answer 2

1. Random assignment (Random groups design)
2. Matching (matched group design)
3. assignment by nature i.e gender, right-handedness etc (natrual groups design)

Question 3

Blockrandomization

Answer 3

Every group has at least one person for each condition and the order of the condition is randomized.

Question 4

5 threats to internal validation

Answer 4

-Intact groups
-Irrelevant conditions
-Selective “cancellation” (people quit experiment)
-Demand characteristics (when the participants use cues in the environment to understand what is expected of them)
-Experiment leader effect

Question 5

Zero hypothesis

Answer 5

When you suppose the result would’ve happened without your independent variable

Question 6

Confidence interval

Answer 6

A way to calculate if an independent variable has had an effect

Question 7

p-value

Answer 7

the value that comes from calculating the probability of the result being random

Question 8

Cohens d =

Answer 8

the difference in means between two conditions / average variability of participant’s scores

Used to calculate effect size.
0,2 small
0,5 medium
0,8 large

Question 9

Inferential statistics

Answer 9

used to see if an independent variable has a reliable effect on the dependent variable