3.4.1 - Biological psychology practical investigation

Conduct one ethical biological-psychology practical: design a correlational study into aggression or body rhythms, specifying co-variables, operationalisation, sampling, controls and hypotheses. Gather quantitative data; present descriptive statistics and a scatter graph; use Spearman's rank to test the relationship and explain significance, strength and direction; evaluate strengths, weaknesses and improvements; and write the procedure, results and discussion. Suitable contexts include social-media use and sleep, or height and self-rated aggression.

Use - biological psychology practical investigation to connect the rule to the data and decision in the question.

This matters because - biological psychology practical investigation determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply - biological psychology practical investigation to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: - Biological psychology practical investigation is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.