Chapter 8 Flashcards
Between subjects design
Experimental design in which different participants are assigned to each level or condition of the independent variable. Also called an independent groups design.
Contrast effect
A within subjects design, occurs when participants response in a later condition are effected by a particular experience they had in an earlier condition
Counter balancing
A method of controlling for order effect in a within subjects design, by either including all possible orders of presentation for conditions or randomly determining the order for each participants
Fatigue effect
When participants perform worse over the course of a study simply because pf diminished effort or fewer resources due to the passage of time; particularly problematic in within subjects designs
Latin square design
A technique to control for order effects without having all possible orders
Matched pair design
In a between subjects experiment a method of assigning participants to conditions in which pairs of participants are first matched on some characteristic and then each meber of the pair is randomly assigned to a condition
Order effect
In a within subjects design the effect that the order of conditions has on thw dependent variable
Posttest only design
A true experimental design in which the dependent varible (posttest) is measured only once, after manipulation of the independent variable
Selecting difference
Difference in the type of participants who make up each group in a between subjects experimental design
Selecting differences
Difference in thw type of participants who make up each group in a between subjects experimental design
Selective attrition
The loss of participants by way of individual choosing to drop out of an experiment. Selective attrition is a threat to internal validity when participants dropouts results in a difference between conditions on some participants, characteristic, causing a confound
Within subjects design
An experiment in which the same participants experience all levels of the independent variable (i.e all conditions) also called a repeated measures design
