1. Jay and Juan building on Feng and Holmes
Dynamics of reward bias effects in a difficult perceptual identification task
Jay and Juan
building on Feng and Holmes

2. Integration of reward and motion information in percpetual decision making (Rorie & Newsome)
Monkey’s choices reflect a beautifully regular combination of the effects of stimulus coherence and reward.

3. Population response of LIP Neurons in two reward conditions
Choose in
Choose out

4. Human Experiment Manipulating Stimulus Response Interval using the Response Signal Method
Stimuli are rectangles shifted 1,3, or 5 pixels L or R of fixation
Reward cue occurs 750 msec before stimulus.
Small arrow head vis for 250 msec.
Only 2-1 and 1-2 conditions are considered.
Response signal occurs at these times after stimulus onset:
Participant receives 1 or 2 point reward if response occurs within 250 msec of response signal and is correct.
Participants were run for sessions to provide stable data.
Data shown are from later sets of sessions in which the biasing effect of reward appeared to be fairly stable.
Three participants have been run for shorter time with same arrows but equal reward to demonstrate that effects of reward bias are not due to arrows per se.

5. Data Slides
Equal reward data showing absence of bias effect for arrows without reward differences
Bias early and late in stimulus interval by sessions
Full data for stable sessions for the five participants receiving differential rewards

6. Bias for three participants with arrows but no differential reward

7. CM JA MJ SL ZA P(choose lg rwd) Early Late Dark = rwd cong stimuli
Light = rwd incng stimuli
Sessions right of line included in later graphs SL ZA