Psych 301.txt

A research technique in which the researcher simply observes and describes behavior

A research technique in which the researcher determines whether variables are related without manipulating the variables

A variable under the control of the experimenter that may effect the dependent variable in a reliable fashion.

The variable being examined by the researcher. It may or may not be effected by the IV

An experimental design in which each subjects is randomly assigned to only one of the treatment conditions

An experimental design where all subjects receive all treatment conditions. Also called a repeated measures design

An error of statistical inference when the null hypothesis is rejected when it is true. This is an error of "seeing too much in the data."

An error of statistical inference when the null hypothesis is retained when it is false. This is an error of "not seeing enough in the data."

Variables not under the control of the experimenter that vary systematically with the independent variable

A research design with more than one IV in which every IV level is present at all levels of the other IVs

any variable other than the IV that affects the DV

• Floor - The values of the DV are so low they are not affected by the IV
• Ceiling - The values of the DV are so high they are not affected by the IV

The effect of the change in level of one factor in a factorial experiment measured independently of other variables.

The tendency of an interviewee to agree with the questioner.

• Random - An IV whose levels were chosen randomly from a population of possible values
• Fixed - An IV whose levels were chosen non-randomly

• Theory - A set of propositions which summarise, organise, and explain a variety of known facts
• Hypothesis - A supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation.