Week 2 - Research Methods Flashcards
Average
Mean
Centre of Distibution
Median
The value that appears the most
Mode
two variables are interconnected; we cannot determine which one has influenced a dependent variable
Confounding variable
change in behaviour because of expectations
Placebo effect
Summaries data
descriptive statistics
shows how frequent participants receive each of the many possible scores
Frequency distribution
provides an index of the way typical participants respond on a measure
Central tendency
describes how much the average person deviates from the mean
Standard deviation
scores of most participants fall in the middle of the bell-shaped distribution
Normal distribution
A quasi-experimental design:
Select one:
a. is useful if an experimental design is impractical.
b. takes advantage of natural groups as they exist in nature.
c. both a and b.
d. neither a nor b.
C - both a and b.
When experiments are impractical, psychologists sometimes employ quasi-experimental designs, which share the logic and many features of the experimental method but do not allow as much control over all relevant variables.
A stratified random sample reflects:
the proportion drawn from each population category.
If I perform some statistics on the data that I have gathered, and those statistics merely summarise the findings, I must have used:
Descriptive statistics
are the first step in understanding a data set and summarise their essential features
_________ statistics apply more complex statistical tests in order to draw inferences from the sample to the population.
inferential statistics
Each participant experiences every condition
Each person is tested at every level of exposure of the IV
This design does not include a control group
Each participant is their own control group
Within- group