<tr><td>Reward Two Back Study</td></tr>

Reward Two Back Study

Description:

The focus of this study is to explore the cognitive effects of positive and negative reinforcement. This study utilizes a Two-back Continuous Performance Task with auditory feedback and reward/punishment, where subjects have to indicate, with button presses, if the current letter presented on the screen is the same as the letter presented two letters earlier. If the subject answered correctly in the given amount of time, then a positive ('correct') feedback tone was delivered and 1 point was added to the subject's total points ($ in their pocket). If the subject answered incorrectly in the given amount of time, then a negative ('wrong') feedback tone was delivered and 1 point was subtracted from the subject's total points ($ out of their pocket). For about 20% of the correct trials and 30% of the incorrect trials, a bonus or penalty tone was delivered instead of the standard tone to indicate that the points added or subtracted from the total points would be 2 and not 1, effectively signaling a 'bonus' or 'penalty' consequence for that trial. To control for the fact that these tones would not only signal enhanced subjective importance but also would be relatively rare (creating an 'oddball' effect), an equally rare, but reinforcement neutral tone was delivered for 6% of the total trials.

Summary:

Number of Sessions: 25

Number of Subjects: 25

Type of Subject Groups: normal

All subjects are considered healthy and normal: Yes

Number of Channels (min to max): 256 to 256

Recorded Modalities: EEG (BioSemi)

Total Size: 10.8 GB

License Type: CC0

Publications:

Swann N., Onton J., Makeig S., Single-Trial EEG changes associated with specific behavioral contexts in a Two-Back Task. Poster session presented to Society for Neuroscience; 2007 Nov; San Diego, CA.

publications/TwobackPosterMini.pdf

Onton J., Makeig S., Relations between sensory and behavioral context and EEG spectra in a working memory Task. Poster session presented to Society for Neuroscience; 2008 Nov; Washington DC.

publications/Makeig_SFN08.pdf

Onton J., Makeig S., Independent modulators of regional EEG alpha sub-band power during a working memory task. Poster session presented to Cognitive Neuroscience Society; 2009 March; San Francisco, CA.

publications/AlphaIMposter.pdf

Thompson W., Mullen T., Onton J., Makeig S., A Bayesian spatiotemporal model for multi-subject EEG source dynamics and effective connectivity (2.2MB pdf poster) ICON XII, Palma, Mallorca, September 25, 2011.

publications/Thompson_and_Mullen_Poster_ICONXI.pdf

Mullen T., Onton J., Delorme A., Makeig S., Analysis and visualization of theta-band information flow dynamics in an ERN-producing task Human Brain Mapping, Barcelona, Spain, June 2010.

http://sccn.ucsd.edu/~scott/abstracts/Mullen_HBM10.html

Onton, J., Makeig, S., Information-based modeling of event-related brain dynamics. In C. Neuper, W. Klimesch (Eds.), Progress in Brain Research, 2006, Vol.159 (pp. 99-120).

DOI: 10.1016/S0079-6123(06)59007-7

Experimenters:

Julie Onton (Principal Experimenter)

Table of Session Information:

Session	Purpose	Lab Id	Subject						EEG Sampling Rate (Hz)	Notes	EEG Recordings	Channel Locations	Number of Channels	Channel Location Type
Session	Purpose	Lab Id	Lab Id	Group	Gender	YOB	Age	Hand	EEG Sampling Rate (Hz)	Notes	EEG Recordings	Channel Locations	Number of Channels	Channel Location Type
1	NA	NA	8	normal	M	1982	22	right	256	D27 unstable; otherwise clean EEG	session/1/eeg_recording_1.bdf	session/1/channel_locations.elp	256	10-20
2	NA	NA	6	normal	M	1981	23	right	256	B19 unstable; B16 unstable off and on	session/2/eeg_recording_1.bdf	session/2/channel_locations.elp	256	10-20
3	NA	NA	10	normal	F	1981	23	right	256	D8 and C24 unstable; H19 noisy; F5 and F11 noisy	session/3/eeg_recording_1.bdf session/3/eeg_recording_2.bdf session/3/eeg_recording_3.bdf session/3/eeg_recording_4.bdf	session/3/channel_locations.elp	256	10-20
4	NA	NA	1	normal	M	1973	31	right	256	D25 noisy; had to start second channel	session/4/eeg_recording_1.bdf session/4/eeg_recording_2.bdf	session/4/channel_locations.elp	256	10-20
5	NA	NA	2	normal	M	1985	19	right	256	key pad problems, got new key pad at 490; came back for testing on 11/15	session/5/eeg_recording_1.bdf	session/5/channel_locations.elp	256	10-20
6	NA	NA	3	normal	F	1979	25	right	256	some strange EEG signals at block 7, resolved itself, happened again at block 12 or 13 maybe due to issues with E cable to box; E21,A12,G7,D8 unstable	session/6/eeg_recording_1.bdf	session/6/channel_locations.elp	256	10-20
7	NA	NA	13	normal	M	1982	23	right	256	clean EEG, B19; towards end tried to ignore sounds, B and Ps payed the most attention to	session/7/eeg_recording_1.bdf	session/7/channel_locations.elp	256	10-20
8	NA	NA	7	normal	F	1984	21	right	256	A16,B1,B19,B8,C15,D29,G7,H10 were wandering; most settled down after about 10 blocks	session/8/eeg_recording_1.bdf	session/8/channel_locations.elp	256	10-20
9	NA	NA	17	normal	F	1980	25	right	256	F15 noisy and unstable; responded more to bonus and positive feedback than tp negative feedback; neutral would throw off track at times; sometimes would focus on letters than than feedback; and felt that they did better when focusing more on feedback	session/9/eeg_recording_1.bdf	session/9/channel_locations.elp	256	10-20
10	NA	NA	18	normal	M	1979	26	right	256	subject reported that neutral tones threw them off; other tones were okay no real reaction; did better when not focusing on feedbacks; F2,F8 noisy and unstable; H5 noisy and unstable near end	session/10/eeg_recording_1.bdf	session/10/channel_locations.elp	256	10-20
11	NA	NA	16	normal	M	1984	21	right	256	some tensing, mostly during baselines; okay during blocks, B19 unstable	session/11/eeg_recording_1.bdf	session/11/channel_locations.elp	256	10-20
12	NA	NA	11	normal	F	1979	26	right	256	A's noisy expecially 2,3,10,11,18,19,25,26,30; E16, A22, G20 noisy; some data glitches- started 2nd.bdf; a few port code errors	session/12/eeg_recording_1.bdf session/12/eeg_recording_2.bdf	session/12/channel_locations.elp	256	10-20
13	NA	NA	19	normal	M	1982	23	right	256	B19 on and off; G32 unstable; F2 on and off; C9 unstable at end	session/13/eeg_recording_1.bdf	session/13/channel_locations.elp	256	10-20
14	NA	NA	20	normal	M	1962	43	right	256	stopped recognizing button at block 20; gave 7 more blocks; A30, A31, A26, G1, D20 noisy	session/14/eeg_recording_1.bdf	session/14/channel_locations.elp	256	10-20
15	NA	NA	21	normal	M	1984	21	right	256	F8, E32 unstable	session/15/eeg_recording_1.bdf	session/15/channel_locations.elp	256	10-20
16	NA	NA	22	normal	M	1977	28	left	256	D20 and D21 noisy, B19 unstable	session/16/eeg_recording_1.bdf	session/16/channel_locations.elp	256	10-20
17	NA	NA	23	normal	F	1984	21	left	256	lots of alpha; C2,B19,E8,A17,A21,A24,A30 unstable; A31 noisy	session/17/eeg_recording_1.bdf	session/17/channel_locations.elp	256	10-20
18	NA	NA	25	normal	M	1983	22	right	256	F2 unstable	session/18/eeg_recording_1.bdf	session/18/channel_locations.elp	256	10-20
19	NA	NA	26	normal	M	1981	24	left	256	lots of alpha; H6, D23 unstable	session/19/eeg_recording_1.bdf	session/19/channel_locations.elp	256	10-20
20	NA	NA	27	normal	M	1984	21	right	256	NA	session/20/eeg_recording_1.bdf	session/20/channel_locations.elp	256	10-20
21	NA	NA	29	normal	F	1981	24	right	256	D21, A30 noisy; A19, C6 unstable; some moments of floating EEG	session/21/eeg_recording_1.bdf	session/21/channel_locations.elp	256	10-20
22	NA	NA	28	normal	F	1983	22	right	256	B12 unstable, D25 off	session/22/eeg_recording_1.bdf	session/22/channel_locations.elp	256	10-20
23	NA	NA	30	normal	F	1983	22	right	256	B12 sometimes unstable, F4, A32 unstable; F14, B19 cleaned up after 5 blocks	session/23/eeg_recording_1.bdf	session/23/channel_locations.elp	256	10-20
24	NA	NA	34	normal	F	1978	27	right	256	D14 spiky	session/24/eeg_recording_1.bdf	session/24/channel_locations.elp	256	10-20
25	NA	NA	35	normal	F	1981	24	right	256	many error codes; bad electrodes G32, F4, G24, C7; AC panel in experiment room maybe causing noise	session/25/eeg_recording_1.bdf	session/25/channel_locations.elp	256	10-20

Study Paradigm and Context

Description	Tag
Subjects were seated in front of a computer monitor with a response pad in their laps that was held with both hands, while performing a reward-two-back task.	Context/Sitting, Paradigm/Reward-Two-Back Task

Table of Event Codes:

Event Code	Condititon
Event Code	Label	Description	Tag
1	'match' response	press the right button on the response pad to indicate that the letter currently on the screen is the same from the letter they saw two presentations prior	Response/Button press
2	'non-match' response	press the left button on the response pad to indicate that the letter currently on the screen is different from the letter they saw two presentations prior	Response/Button press
20	neutral correct	on a correct response a neutral tone was delivered that did not convey any information about whether the answer was correct or not, but they gained 1 point	Stimulus/Auditory/Tone, Stimulus/Oddball/0.06, Stimulus/Feedback/Reward/$1
25	neutral wrong	on a wrong response a neutral tone was delivered that did not convey any information about whether the answer was correct or not, but they lost 1 point	Stimulus/Auditory/Tone, Stimulus/Oddball/0.06, Stimulus/Feedback/Penalty/$1
30	picture B	the letter B appears on the screen	Stimulus/Visual/Language/Character/Letter/B
31	picture C	the letter C appears on the screen	Stimulus/Visual/Language/Character/Letter/C
32	picture F	the letter F appears on the screen	Stimulus/Visual/Language/Character/Letter/F
33	picture H	the letter H appears on the screen	Stimulus/Visual/Language/Character/Letter/H
34	picture J	the letter J appears on the screen	Stimulus/Visual/Language/Character/Letter/J
35	picture K	the letter K appears on the screen	Stimulus/Visual/Language/Character/Letter/K
36	picture A	the letter A appears on the screen. 'A' is the two back letter	Stimulus/Visual/Language/Character/Letter/A
37	picture rest	the rest display with fixation cross is presented	Stimulus/Visual/Fixation point, Stimulus/Visual/Screen Location/Center
38	picture prepare	refers to just one second before the start of sequential letter presentations	Stimulus/Onset, Stimulus/Task Rest Start
40	sound wrong	when an answer is wrong, a low tone that is associated with wrong responses and -1 point is delivered	Stimulus/Auditory/Tone, Stimulus/Feedback/Incorrect, Stimulus/Feedback/Penalty/$1
45	sound penalty	during 'penalty' trials a different feedback tone is given denoting a loss of 2 points instead of 1 point for a wrong answer	Stimulus/Auditory/Tone, Stimulus/Feedback/Incorrect, Stimulus/Feedback/Penalty, Stimulus/Oddball/0.3, Stimulus/Feedback/Penalty/$2
60	sound correct	when an answer is correct, a high tone that is associated with correct responses and +1 point is delivered	Stimulus/Auditory/Tone, Stimulus/Feedback/Correct, Stimulus/Feedback/Reward/$1
65	sound bonus	during 'bonus' trials another tone is given denoting a gain of 2 points instead of 1 point for a correct answer	Stimulus/Auditory/Tone, Stimulus/Feedback/Correct, Stimulus/Oddball/0.2, Stimulus/Feedback/Reward/$2

Contact:

For data results or more information regarding this study contact: Julie Onton

phone: [use FIRSTNAME from above]@sccn.ucsd.edu

phone: 619-767-4769

License Agreement:

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License link

This data was recorded under the approval of the Institutional Review Board (IRB) of the University of California, San Diego (#031151).