Key Science Skills Psychology:

Population is the wider group of people that a study is investigating.

^Sample is the smaller group of people selected from the population who will be participants in the investigation.

Hypothesis: An idea or explanation for something that is based on known facts but has not yet been proven

Aim: The purpose of a study

Variables:

^Independent variable: The variable that is being manipulated (controlled, selected or changed) by the researcher

^Dependent variable: The variable that is being measured by the researcher

^Controlled variable A variable that is help constant to ensure that the only influence on the dependent variable is the independent variable:

^Extraneous variable: A variable other than the independent variable that may have an unwanted effect on the dependant variable and results of an inves

^Confounding variable:

Sampling Techniques:

^Random sampling:

^Stratified sampling:

Investigation Methodologies:

^Case study

^Classification and identification

^Controlled experiment

^Correlational study

^Fieldwork

^Literature review

^Modelling

^Simulation

^Product, process or system development

Models and Theories:

^Models:

^Theories:

Groups:

^Experimental groups:

^Control groups: