EXPE CHAPTER 9: BASIC BETWEEN- SUBJECTS DESIGNS Flashcards
between-subjects design
a subject participates in only one condition of the experiment
MINIMUM NUMBER OF SUBJECTS FOR EACH GROUP?
10-20 subjects in each treatment condition to detect a strong treatment effect.
a statistical estimate of the size or magnitude of a treatment effect.
EFFECT SIZE
involves assigning subjects to conditions so that each subject has an equal chance of participating in each condition. equally distribute subject variables between the treatment groups to prevent them from confounding an experiment.
RANDOM ASSIGNMENT
presents a value of the independent variable.
EXPERIMENTAL CONDITION
presents a zero level of the independent variable.
CONTROL CONDITION
TWO INDEPENDENT GROUPS DESIGN
EXPERIMENTAL GROUP receives a level of the IV and the CONTROL GROUP receives the same procedures, but receives no treatment.
HOW WOULD YOU MATCH ON IQ USING PRECISION MATCHING?
Form pairs of identical IQ scores (120 with 120).
Randomly assign members of each pair to one of two treatment conditions.
HOW WOULD YOU MATCH ON IQ USING RANGE MATCHING?
Form pairs of scores that fall within a specified range like 5 points (115 with 120, 135 with 140).
Randomly assign members of each pair to one of two treatment conditions.
HOW WOULD YOU MATCH ON IQ USING RANK- ORDERED MATCHING?
Rank all IQ scores from highest to lowest.
Form pairs of scores that fall in adjacent ranks (1st score with 2nd score, 3rd with 4th).
Randomly assign members of each pair to one of two treatment groups.
a process for randomly assigning equal numbers of subjects to conditions.
Block randomization
a trial run of the experiment that uses a few subjects.
PILOT STUDY
