Chaubris And Braver

Summary: The goal of Gray, Chabris & Braver’s’(2003) study was to determine if individual differences in General Fluid Intelligence (gF) would be more evident in lure trials of the three-back task, both in terms of the performance and neural activation. To accomplish this task Gray, Chabris & Braver (2003) collected a sample of 60 healthy, right-handed, native English-speaking individuals from Washington University and the surrounding community. Gray, Chabris & Braver (2003) first used the Raven’s Advanced Progressive Matrices (APM) to measure the gF of the participants involved in the study, the APM contained 36 questions for the participants to complete. After the gF results were collected Gray, Chabris & Braver (2003) administered the three-back task, in each scanning run participants had to determine if the third face or word in the sequence matched the stimulus three spaces backwards.
The studied condition was the lure task vs. non-lure, where the stimuli were more recently revealed to the subject. Lastly, Gray, Chabris & Braver (2003) collected fMRI data to measure the magnitude of brain activity and gF using a general linear model to measure correlations between the brain activity and gF. Gray, Chabris & Braver (2003) also tested the correlation between gF and brain activity by using multiple regression to determine if the relation between gF and lure trial activity was specifically restricted to lure trials. Through the use of these procedures Gray, Chabris & Braver found that there was a correlation between high gF and the lure trials of the three-back task, and that the primary area of activation was in the priori search