Medial rostral prefrontal cortex and the neuroeconomics of mental time travel
Roland G. BenoitSam J. Gilbert
Paul W. BurgessUniversity College London
imagining the future
Addis, Wong, & Schacter, 2007
subjective value
Kable & Glimcher, 2007
metanalysis
Gilbert et al., 2006
* ImagineLunch Imagine
Lunch£ 27 in 360 days
£ 27 in 360 days1=yes; 2=no
Emotional?0=detach. … 4=highly
Experiencing?0=none … 4=highly
1s2s
14smax 4.5s
max 4s
max 4s
until 28.5 s
+
Task Episodic prospection
Semantic prospection
Arithmetic operations
Imagine Imagine the episode of spending the money in the scenario
X X X
Estimate Estimate what the money could buy you in the scenario
X X
Counting Count forwards (backwards) from the indicated number in steps of 3 (4)
X
5 amounts [£: 26;33;42;52;65] X 4 delays [days: 30;90;180;360]; 20 scenarios
£ 25 now
summary design
• 2 runs, each 10 trials of each task (Imagine, Estimate, Count)
• 28.5s * 30 trials = 855s (14.25min); 855s * 2 runs = 1710s (28.5 min)
• Instructions + practicing: ca. 60 min• Debriefing:
– Consideration of future consequences scale (Strathman et al., 1994)– Vividness of visual imagery questionnaire (Marks, 1973)– Given the money that you will probably have at those time points, how
much will £ 25 be worth to you [now; 30;90;180;360]?
• functional sequence:– 64 x 64; 3.5 x 3.5 mm pixels; 33 axial slices (3.5 mm thick, oriented to
the AC-PC plane)– TR: 2.5 s; TE: 40 ms;
• structural sequence: MPRAGE?• field maps
Top Related