Determining optimal parameters of the Self Referent Encoding Task: A large-scale examination of self-referent cognition and depression

This file is one of a series of supplemental explanatory documents for the study “Determining optimal parameters of the Self Referent Encoding Task: A large-scale examination of self-referent cognition and depression”. Data and code are located at doi: 10.18738/T8/XK5PXX, and websites with visual R Markdown explanations are located and navigable on the paper’s github pages website.

Data description

This code produces summary data for the outcome variables of the SRET, for all three samples, as well as summarizing some demographic data. Demographic data has been redacted for the adolescent sample to ensure that underage participants are completely deidentified, although no identifying information is included for any participants. If you are viewing this as an HTML file, and wish to see the code, please download the R Markdown file from the Texas Data Repository. It includes HTML tables.

Import the data from all groups.

Demographics

group groupcount
college 608
MTurk 293
adolescent 270
group sex count
college female 231
college male 129
college NA 248
MTurk female 165
MTurk male 120
MTurk NA 8

Joining, by = “group”

group race count groupcount percentage
college asian 24 144 17 %
college black 8 144 6 %
college blank/other 18 144 12 %
college indigenous 2 144 1 %
college islander 1 144 1 %
college multiracial 8 144 6 %
college white 83 144 58 %
MTurk asian 24 285 8 %
MTurk black 23 285 8 %
MTurk blank/other 1 285 0 %
MTurk latino 8 285 3 %
MTurk multiracial 4 285 1 %
MTurk white 225 285 79 %

Per-group summary data on depression

Recall that the adolescents completed the CDI:S; college students and MTurk participants completed the CES-D.

group depmeans depsds
college 14.19 9.71
MTurk 13.39 11.85
adolescent 2.41 3.03
group abovecutoff.CESD abovecutoff.CDI n cesd.perc cdi.perc
college 188 538 595 0.316 0.9042
MTurk 98 214 285 0.3439 0.7509
adolescent 0 71 270 0 0.263

Per-group summary data on behavior on the SRET

Behavioral

group pos endorsement sdp neg endorsement sdn net valence sdnv
college 20.38 7.09 5.41 5.36 14.96 10.95
MTurk 20 8.12 5.24 6.41 14.76 13.51
adolescent 20.02 5.15 2.62 4.03 17.4 8.12
group pos SR recall sdSRp neg SR recall sdSRn pos recall sdp neg recall sdn
college 7.39 3.42 2.81 2.91 9.35 3.51 9.59 3.6
MTurk 5.23 3.15 2.06 2.55 6.78 3.47 7.1 3.5
adolescent 5.14 2.73 0.74 1.44 6.19 2.88 4.75 3.43
group pos RT sdp neg RT sdn
college 829.1 230 852.6 220.6
MTurk 708.3 172.7 719.4 172
adolescent 906 252.8 920.5 231.2

and for the diffusion model

group pos drift rate sdvp neg dr sdvn pos rel. st. point sdpzr neg rsp sdnzr
college 1.56 1.71 -1.56 1.39 0.57 0.1 0.47 0.12
MTurk 1.79 2.11 -2.06 1.82 0.56 0.12 0.43 0.13
adolescent 1.58 1.36 -2.02 1.28 0.61 0.14 0.43 0.13
group (a) sda (t0) sdt0 (d) sdd (szr) sdszr (sv) sdsv (st0) sdst0 (p) sdp
college 1.33 0.33 0.52 0.08 0.01 0.03 0.29 0.12 0.57 0.21 0.23 0.11 0.2 0.21
MTurk 1.22 0.34 0.51 0.09 0.01 0.03 0.3 0.1 0.6 0.24 0.18 0.09 0.16 0.17
adolescent 1.57 0.41 0.59 0.11 0.01 0.05 0.27 0.11 0.54 0.21 0.24 0.11 0.18 0.18