I. BASIC CONCEPTS IN RESEARCH

A. WHAT IS A VARIABLE

B. VALIDITY

C. RELIABILITY

II. RESEARCH DESIGNS IN HEALTH PSYCHOLOGY

A. EXPERIMENTAL DESIGN

B. EX-POST FACTO DESIGN

C. CORRELATIONAL STUDIES

D. SINGLE SUBJECT DESIGN

E. CROSS-SECTIONAL DESIGN

F. LONGITUDINAL DESIGN

G. CROSS-SECTIONAL SEQUENTIAL DESIGN

III. EPIDEMIOLOGY

A. PURPOSE

B. PREVALANCE VS. INCIDENCE

C. RESEARCH DESIGNS

1. OBSERVATIONAL STUDIES

2. NATURAL EXPERIMENTS

3. EXPERIMENTAL INVESTIGATIONS