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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., Mackeig 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., Mackeig 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., Mackeig 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 Investigator)

Table of Session Information:

Session Purpose Lab Id Subject EEG Sampling Rate (Hz) Notes EEG Recordings Channel Locations Number of Channels Channel Location Type
Lab Id Group Gender YOB Age Hand
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
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:

The person who associated a work with this deed has dedicated the work to the public domain by waiving all of his or her rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law. You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission. In no way are the patent or trademark rights of any person affected by CC0, nor are the rights that other persons may have in the work or in how the work is used, such as publicity or privacy rights. Unless expressly stated otherwise, the person who associated a work with this deed makes no warranties about the work, and disclaims liability for all uses of the work, to the fullest extent permitted by applicable law. When using or citing the work, you should not imply endorsement by the author or the affirmer.

License link

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