PS295 Lecture Notes - Lecture 3: Demand Characteristics, Dependent And Independent Variables, Repeated Measures Design
Document Summary
Types of experimental designs: summary: randomized groups design, matched subjects design, between subjects design, uncorrelated groups design, between- subjects design, correlated groups design, repeated measures design, within subjects design, correlated groups design. Randomized groups design / between subjects design: researcher creates 2 conditions, participants are randomly assigned to either condition using random assignment or blocked random assignment. Testing effects: fatigue effects, participants become bored, tired, less motivated as the experiment, practice effects, occurs when participants performance improves because they complete the. Counterbalancing: presenting levels of the iv in different orders to different: different participants are exposed to different orders of the conditions, all possible orders of the iv are used when feasible. Goal is to ensure that each condition occurs early in the sequence as often as it occurs late in the sequence. Types of counterbalancing: complete counterbalancing in experiment, incomplete counterbalancing. Every possible order is presented and every order is run equally often.
