Chapter 3

Research Methods in Clinical Psychology

Set F

National Institute for Health and Clinical Excellence (NICE)

An independent UK organisation responsible for providing national guidance on promoting good health and preventing and treating ill health.

Null Hypothesis

A pattern of findings which are a result of chance rather than experimental manipulation.

No Treatment Control Condition

The allocation of participants to a control condition, in which they do not receive the treatment under investigation.

Placebo Control Condition

A control group that is included in a clinical trial to assess the effects of participant expectations.

Placebo Effect

The effect when participants in a clinical trial show improvement even though they are not being given a theoretically structured treatment.

Negative Correlation

A relationship between two variables in which a high score on one measure is accompanied by a low score on the other.

Null Hypothesis Significance Testing

Then use of inferential statistics to establish whether differences between experimental groups are statistically significant (and are therefore unlikely to have occurred by chance).

One-Month Prevalence

The frequency of a disorder within the last month.