Unit 0 Part 4: Types of Research Methods (Updated 2025)

Experimental vs. Non-Experimental Research00:00:34

Experimental research aims to determine cause-and-effect by manipulating independent variables and using control groups. Non-experimental research observes behaviors as they naturally occur to identify patterns without manipulation, which is useful when ethical or practical constraints prevent experimentation.

Types of Non-Experimental Methods00:03:34

This section covers case studies (in-depth examination of an individual or small group), naturalistic observation (recording behavior in real-life settings), correlational studies (examining relationships between factors), and meta-analysis (statistically combining results from multiple studies for a generalized conclusion).

Quantitative vs. Qualitative Data Collection00:08:38

Psychologists collect data using either quantitative methods (numerical data, including Likert scales) or qualitative methods (in-depth narrative and descriptive data). Understanding the distinction is crucial for selecting appropriate analysis tools.

Surveys and Potential Biases00:11:15

Surveys are procedural methods for collecting large amounts of self-reported data. While efficient, they are susceptible to biases such as self-report bias and social desirability bias, which can compromise the accuracy of findings.

Review Questions00:13:48

The video concludes with a set of review questions designed to test comprehension of research methodology, including identifying appropriate study designs for specific psychological questions.