Psychology 1000 Chapter Notes - Chapter 5-6: Diffusion Mri, Absolute Threshold, Synesthesia

• School: Western University
• Department: Psychology
• Course: Psychology 1000
• Professor: John Campbell

Document Summary

Mixing of the senses may experience sounds as colours or tastes. Women are more likely to be syntesthetes than men. Theories of: the pruning of neural connections that occurs in infancy has not yet occurred in people with synaesthesia, some brain regions retain connections that are absent in most people. Diffusion tensor imaging, which lights up white matter pathways in the brain, reveals increased connectivity in patients with synesthesia. Transduction: the characteristics of a stimulus are converted into nerve impulses. The absolute threshold is the lowest intensity at which stimulus can be detected (50% of the time) Signal detection theory : the factors that influence sensory judgements. Decision criteria: a participant must be some level of certain that the stimulus is present before they say it is, which can change person to person and time to time. Some of the factors that change the decision criteria are fatigue, expectation, significance of the stimulus.