Research method that involves an intensive investigation of one or more participants

Research method in which data are collected about a group of participants over a number of years to assess how certain characteristics change or remain the same during development

Research method in which data are collected from groups of participants of different ages and compared so that conclusions can be drawn about differences due to age

The measure of a relationship between two variables or sets of data

Any factor that is capable of change

The group to which an independent variable is applied

The group that is treated in the same way as experimental group except that the experimental treatment is not applied

Researchers expectations influences the persons behavior, and there by influence the participants behavior

An experiment in which the participants are aware of who received the treatment

An experiment in which neither experimenter nor the participants know which participants received which treatment

A change in a participants illness or behavior that results from a belief that the treatment will have an effect rather than from the actual treatment

The listing and summarizing of data in a practical, efficient way

An arrangement of data that indicates how often a particular score or observation occurs.

A number that describes something about the "average" score of a distribution variance.

A measure of variability that describes an average distance of every score from the mean.

A measure of variability that is the mean of the squares of the deviances of the mean of the set data.

Describes the direction and strength of the relationship between two sets of variables.

Numerical methods used to determine whether research data support a hypothesis of whether results were due to chance.