This is a fully planned and resourced lesson complete with starter, main and plenary tasks for factors affecting perception (chapter 2 on the AQA course).
A full lesson on experimental design for Chapter 4: Research Methods of the AQA GCSE Psychology course.
You will find
A full lesson (PP presentation) which can be split over 2 hours or taught in one hour.
Starter and plenary tasks
Experimental design information sheets
A main research task with a table for students to complete.
If done over two hours, the second lesson can be supplemented with students designing a quiz on experimental design for their peers.