Glossary / Lexicon

Experimental method refers to a research method used to uncover cause-and-effect relationships between . . . Read More

Time-lag design refers to a quasi-experimental design similar to the cross-sectional design in which . . . Read More

Variable refers to a dimension along which people, things, or events differIn the psychology context, . . . Read More

Null hypothesis the hypothesis alternative to a primary hypothesis, stating that there is no relationship . . . Read More

Independant Variable: Independent variable in the psychology context refers to the variable that is manipulated . . . Read More

History as a threat to internal validity : History as a threat to internal validity is a change in the . . . Read More

Manipulation is defined as the alteration of a variable by an experimenter in expectation that the alteration . . . Read More

Experimental research is defined essentially as research in which the causal (independent ) variable(s) . . . Read More

Experimental Condition: Experimental condition in the psychology context refers to the specific environment, . . . Read More

Internal validity refers to the certainty that experimental interventions did indeed cause the changes . . . Read More