Draganski Evaluation

Question 1

2 pros, 2 cons

Answer 1

• Use of voxel-based morphometry and MRI allowed collection of objective biological data increasing construct validity
• True experiment design (random allocation, iv manipulated) increases causation and internal validity
• Sample was small (24 participants and mostly female as well) meaning uses average of neural growth may have been unreliable and lowers external validity
• Participants practiced outside the lab introducing potential extraneous variable which could reduce internal validity.