Discuss the use of technology in investigating cognitive processes

PET (Positron Emission Tomography)
This is one of the many neuroimaging techniques that has allowed cognitive psychologists to obtain images of the brain functioning. The example cited in Crane’s textbook is glucose consumption and blood flow. This specific piece of equipment has helped neuroscientists develop groundbreaking methods to detect the early signs of Alzheimer’s.

A study to consider: This longitudinal study had a sample size of 53 normal, healthy patients for a period ranging from 9 to 24 years. The study found that individuals who showed early signs of a reduced metabolism in the hippocampus were associated with the later development of Alzheimer’s. Lisa Mosconi stated that that there are some concerns with ecological validity of the study and results, but also that this new technique with the PET could be a useful tool for combating the tragic disease.



MRI (Magnetic Resonance Imaging)
This piece of equipment provides 3D imaging of the brain structures. The MRI and the more commonly used fMRI work by detecting changes in the oxygen levels in blood. For example, when a specific area of the brain is more active, it consequently uses more oxygen therefore making it easier for psychologists to observe a cognitive phenomenon.

'''This needs some input on how this is used with cognitive psych. Strengths and limitations would be helpful as well.'''

Jesse's Sketch
Many aspects of the cognitive level of analysis cannot be directly observed from brain imaging (schema, level of memory encoding). However, when a goal is specific enough, technological investigation can provide empircal evidence. Take a look at Craik-Lockhart memory model’s empirical evidence. I can elaborate on this later.