experimental design

Question 1

independent group design ?

Answer 1

PT places in separate groups each group does 1 level of the IV. both groups have the same instructions

group 1 - completes task with TV on
group 2 - completes task with TV off

researcher then compares 2 groups

Question 2

issue of independent design ?

Answer 2

• cannot control effects of PT variables (confounding variables)
• 2 groups therefore needs more PT

Question 3

how to deal with independent group design problem ?

Answer 3

randomly allocating PT to conditions to distribute PT variables evenly

Question 4

repeated measures definition ?

Answer 4

all PT receive all levels of IV

each PT does HW task with TV on, week later they do HW with the TV off.
- researcher then compares the results

Question 5

issue with repeated measures ?

Answer 5

• order could affect performance
• could be bored of task or already know the answers due to having already done it

Question 6

how to solve issues of repeated measures ?

Answer 6

• use 2 diff tests
• use red herrings

Question 7

matched pair design ?

Answer 7

2 groups of a different level of the IV however based on the key characteristics of the study

same IQ level for PT A in group 1 and PT A in group 2
- compared by researcher

Question 8

issues of matched pair design ?

Answer 8

• time consuming to match PT
• cannot control all variables

Question 9

how to solve the issues of matched pair design ?

Answer 9

• limiting the number of variables you’re matching
• pilot study