Partner Attraction GNAT

Technical Manual

Script Author: Marisa Okano

Credits:
Millisecond thanks Marisa Okano for sharing her script!

Last Modified: January 04, 2025 by K. Borchert (katjab@millisecond.com), Millisecond

Script Copyright © Millisecond Software, LLC

Background

This “Attraction pGNAT” is a modified version of the Go/No-go Association Task (GNAT), which was originally designed to measure automatic associations regarding a single target construct (Nosek & Banaji, 2001). Specifically, the same basic procedure of the GNAT is used to assess the strength of participants' positive versus negative associations regarding a single target category (e.g. physical attractiveness); however, the GNAT will be modified to reflect the personalized version utilized in the study of explicit and implicit preferences of physical attractiveness by Eastwick, Eagly, Finkel, & Johnson (2011).

In general, the GNAT uses uses the Go-Nogo framework of responding to signal and noise stimuli to investigate implicit bias. In contrast to reaction time based tests of implicit bias (e.g. Implicit Association Test), the GNAT framework mainly focuses on accuracy data and specifically d prime measures (measures of sensitivity to distinguish signals from noise in signal detection theory) to infer implicit bias.

For example, a positive association of 'physical attractiveness' (the target signal) is suggested if the dprime measure in the condition 'Physical Attractiveness-I like' (both of these categories are signals) is greater than the dprime measure in the condition 'Physical Attractiveness-I don't like' (both of these categories are signals).

This script investigates the following three categories: •PA = physical appearance •SS = social status •PE = personality by pairing them with the attribute categories 'I like' vs. 'I don't like'

The implemented procedure of the “Attraction pGNAT” is based on Eastwick et al (2011).

References

Attraction Pgnat
Eastwick, P. W., Eagly, A. H., Finkel, E. J., & Johnson, S. E. (2011). Implicit and explicit preferences for physical attractiveness in a romantic partner: A double dissociation in predictive validity. Journal of Personality and Social Psychology, 101, 993-1011.

Adjustments To Z-Scores
Gregg, A. & Sedikides, C. (2010). Narcissistic Fragility: Rethinking Its Links to Explicit and Implicit Self-esteem, Self and Identity, 9:2, 142-161 (p.148)

Duration

20 minutes

Description

Participants are asked to categorize items (e.g words "attractive", "wealthy" etc) into predetermined categories via keystroke presses. The basic task is to press the Spacebar if an items (e.g. "attractive") belongs to the category currently being tested (e.g. Physical Appearance) and to do nothing if it doesn't. For practice, participants sort items into categories "Physical Appearance", "Social Status", "Personality" as well as evaluative preference categories "I like" and "I don't like". For the test, participants are asked to sort categories into the paired/combined categories (e.g. "Physical Appearance OR I don't like"). When an item belongs to either one of these two categories, participants should press the Spacebar.

Procedure

3 target categories (Physical Appearance (PA), Social Status (SS), and Personality (PE)) x 2 preference categories (like vs. dislike)

• 3 practice blocks of categorizing items into 3 target categories Physical Appearance (PA), Social Status (SS), and Personality (PE)
=> target categories are tested in blocked format, order of blocks is random
=> 25 trials each
• 2 practice blocks of categorizing items into 2 preference categories (Like/Dislike)
=> preference categories are tested in blocked format, order is random
=> 20 trials each
• 6 test blocks: combination of 3 target categories (PA, SS, PE) x 2 like categories (like, dislike)
categorization of items into paired/combined categories (e.g. sort items into "Physical Appearance" OR "I like")
=> combined categories are tested in blocked format, order of the test blocks is random
=> 15 practice trials followed by 60 test trials

• responsewindow:
practice: 750ms
test: 1000ms

Stimuli

under section Editable Stimuli

Instructions

under section Editable Instructions as well as section Instructions

Scoring

Zscore Adjustments
zScore Adjustements of hit and false alarm (FA) rates are based on recommendations by Gregg & Sedikides (2010, p.148).
If the hit rate / FA rate is 0 => 0.005 is used instead
IF the hit rate / FA rate is 1.0 => 0.995 is used instead

Summary Data

File Name: attraction_pgnat_summary*.iqdat

Data Fields

NameDescription
inquisit.version Inquisit version number
computer.platform Device platform: win | mac |ios | android
computer.touch 0 = device has no touchscreen capabilities; 1 = device has touchscreen capabilities
computer.hasKeyboard 0 = no external keyboard detected; 1 = external keyboard detected
startDate Date the session was run
startTime Time the session was run
subjectId Participant ID
groupId Group number
sessionId Session number
elapsedTime Session duration in ms
completed 0 = Test was not completed
1 = Test was completed
Pa-Like Condition: Signals = Physical Appearance (Pa), Like Attributes; Noise = Anything Else (Objects Or Dislike Attributes)
rHitPALike Hit rate for pairing PA-like across all responsetimeouts; test trials only
hit: pressing spacebar for signals (Physical Appearance (PA) OR like) in PALike condition
rMissPALike Miss rate for pairing PA-like across all responsetimeouts; test trials only
miss: not pressing spacebar for signals (Physical Appearance (PA) OR like) in PALike condition
rFaPALike False alarm (FA) rate for pairing PA-like across all responsetimeouts; test trials only
false alarm: pressing spacebar for noise stims (objects OR dislike) in PALike condition
rCrPALike Correct rejection (CR) for pairing PA-like across all responsetimeouts; test trials only
cr: not pressing spacebar for noise stims (objects OR dislike) in PALike condition
zHitPALike Z-score of hit rate for pairings PA-like (here: Physical Appearance (PA)-like)
zFaPALike Z-score of FA rate for pairings PA-like (here: Physical Appearance (PA)-like)
dPrimePALike Computes d' (parametric measure of discriminability btw. signals and noise) for 'Physical Appearance (PA)-like' Pairings
=> Range (in this script)
-5.1516586840152740479 <= dprime <= 5.1516586840152740479 (=perfect performance)
=> The higher the value, the better signals (go stims) were distinguished from noise (nogo stims)
(d' = 0: chance performance; negative d-primes: participant treated nontargets as targets and targets as nontargets)
cPALike C-criterion in signal detection:The absolute value of c provides an indication of the strength of
the response bias/response style
negative: participant more likely to report that signal (go stims) is present (liberal response style)
may favor faster responding in speed-accuracy trade-off response paradigms
positive: favoring caution (conservative response style)
Pa-Dislike Condition: Signals = Physical Appearance (Pa), Dislike Attributes; Noise = Anything Else (Objects Or Like Attributes)
rHitPADislike Hit rate for pairing PA-dislike across all responsetimeouts; test trials only
hit: pressing spacebar for signals (Physical Appearance (PA) OR dislike) in PADislike condition
rMissPADislike Miss rate for pairing PA-dislike across all responsetimeouts; test trials only
miss: not pressing spacebar for signals (Physical Appearance (PA) OR dislike) in PADislike condition
rFaPADislike False alarm (FA) rate for pairing PA-dislike across all responsetimeouts; test trials only
false alarm: pressing spacebar for noise stims (objects OR like) in PADislike condition
rCrPADislike Correct rejection (CR) for pairing PA-dislike across all responsetimeouts; test trials only
cr: not pressing spacebar for noise stims (objects OR like) in PADislike condition
zHitPADislike Z-score of hit rate for pairings PA-dislike (here: Physical Appearance (PA)-dislike)
zFaPADislike Z-score of FA rate for pairings PA-dislike (here: Physical Appearance (PA)-dislike)
dPrimePADislike Computes d' (parametric measure of discriminability btw. signals and noise) for 'Physical Appearance (PA)-dislike' Pairings
cPADislike C-criterion in PADislike condition
dPrimeDiffTargetPA The difference in dprime btw. PALike and PADislike (PALike-PADislike)
=> if d prime for Physical Appearance (PA)-like is larger than for Physical Appearance (PA)-dislike (positive difference)
participant more closely associated PA with like than with dislike attributes
=> if d prime for Physical Appearance (PA)-like is smaller than for Physical Appearance (PA)-dislike (negative difference)
participant more closely associated PA with dislike than with like attributes
Ss-Like Condition: Signals = Social Status (Ss), Like Attributes; Noise = Anything Else (Objects Or Dislike Attributes)
rHitSSLike Hit rate for pairing SS-like across all responsetimeouts; test trials only
hit: pressing spacebar for signals (Social Status (SS) OR like) in SSLike condition
rMissSSLike Miss rate for pairing SS-like across all responsetimeouts; test trials only
miss: not pressing spacebar for signals (Social Status (SS) OR like) in SSLike condition
rFaSSLike False alarm (FA) rate for pairing SS-like across all responsetimeouts; test trials only
false alarm: pressing spacebar for noise stims (objects OR dislike) in SSLike condition
rCrSSLike Correct rejection (CR) for pairing SS-like across all responsetimeouts; test trials only
cr: not pressing spacebar for noise stims (objects OR dislike) in SSLike condition
zHitSSLike Z-score of hit rate for pairings SS-like (here: Social Status (SS)-like)
zFaSSLike Z-score of FA rate for pairings SS-like (here: Social Status (SS)-like)
dPrimeSSLike Computes d' (parametric measure of discriminability btw. signals and noise) for 'Social Status (SS)-like' pairings
cSSLike C-criterion
Ss-Dislike Condition: Signals = Social Status (Ss), Dislike Attributes; Noise = Anything Else (Objects Or Like Attributes)
rHitSSDislike Hit rate for pairing SS-dislike across all responsetimeouts; test trials only
hit: pressing spacebar for signals (Social Status (SS) OR dislike) in SSDislike condition
rMissSSDislike Miss rate for pairing SS-dislike across all responsetimeouts; test trials only
miss: not pressing spacebar for signals (Social Status (SS) OR dislike) in SSDislike condition
rFaSSDislike False alarm (FA) rate for pairing SS-dislike across all responsetimeouts; test trials only
false alarm: pressing spacebar for noise stims (objects OR like) in SSDislike condition
rCrSSDislike Correct rejection (CR) for pairing SS-dislike across all responsetimeouts; test trials only
cr: not pressing spacebar for noise stims (objects OR like) in SSDislike condition
zHitSSDislike Z-score of hit rate for pairings SS-dislike (here: Social Status (SS)-dislike)
zFaSSDislike Z-score of FA rate for pairings SS-dislike (here: Social Status (SS)-dislike)
dPrimeSSDislike Computes d' (parametric measure of discriminability btw. signals and noise) for 'Social Status (SS)-dislike' pairings
cSSDislike C-criterion in SSDislike condition
dPrimeDiffTargetSS The difference in dprime btw. SSLike and SSDislike (SSLike-SSDislike)
=> if d prime for Social Status (SS)-like is larger than for Social Status (SS)-dislike (positive difference)
Participant more closely associated SS with like than with dislike attributes
=> if d prime for Social Status (SS)-like is smaller than for Social Status (SS)-dislike (negative difference)
Participant more closely associated SS with dislike than with like attributes
Pe-Like Condition: Signals = Personality (Pe), Like Attributes; Noise = Anything Else (Objects Or Dislike Attributes)
rHitPELike Hit rate for pairing PE-like across all responsetimeouts; test trials only
hit: pressing spacebar for signals (Personality (PE) OR like) in PELike condition
rMissPELike Miss rate for pairing PE-like across all responsetimeouts; test trials only
miss: not pressing spacebar for signals (Personality (PE) OR like) in PELike condition
rFaPELike False alarm (FA) rate for pairing PE-like across all responsetimeouts; test trials only
false alarm: pressing spacebar for noise stims (objects OR dislike) in PELike condition
rCrPELike Correct rejection (CR) for pairing PE-like across all responsetimeouts; test trials only
cr: not pressing spacebar for noise stims (objects OR dislike) in PELike condition
zHitPELike Z-score of hit rate for pairings PE-like (here: Personality (PE)-like)
zFaPELike Z-score of FA rate for pairings PE-like (here: Personality (PE)-like)
dPrimePELike Computes d' (parametric measure of discriminability btw. signals and noise) for 'Personality (PE)-like' pairings
cPELike C-criterion
Pe-Dislike Condition: Signals = Personality (Pe), Dislike Attributes; Noise = Anything Else (Objects Or Like Attributes)
rHitPEDislike Hit rate for pairing PE-dislike across all responsetimeouts; test trials only
hit: pressing spacebar for signals (Personality (PE) OR dislike) in PEDislike condition
rMissPEDislike Miss rate for pairing PE-dislike across all responsetimeouts; test trials only
miss: not pressing spacebar for signals (Personality (PE) OR dislike) in PEDislike condition
rFaPEDislike False alarm (FA) rate for pairing PE-dislike across all responsetimeouts; test trials only
false alarm: pressing spacebar for noise stims (objects OR like) in PEDislike condition
rCrPEDislike Correct rejection (CR) for pairing PE-dislike across all responsetimeouts; test trials only
cr: not pressing spacebar for noise stims (objects OR like) in PEDislike condition
zHitPEDislike Z-score of hit rate for pairings PE-dislike (here: Personality (PE)-dislike)
zFaPEDislike Z-score of FA rate for pairings PE-dislike (here: Personality (PE)-dislike)
dPrimePEDislike Computes d' (parametric measure of discriminability btw. signals and noise) for 'Personality (PE)-dislike' pairings
cPEDislike C-criterion in PEDislike condition
dPrimeDiffTargetSS The difference in dprime btw. PELike and PEDislike (PELike-PEDislike)
=> if d prime for Personality (PE)-like is larger than for Personality (PE)-dislike (positive difference)
Participant more closely associated SS with like than with dislike attributes
=> if d prime for Personality (PE)-like is smaller than for Personality (PE)-dislike (negative difference)
Participant more closely associated SS with dislike than with like attributes

Raw Data

File Name: attraction_pgnat_raw*.iqdat

Data Fields

NameDescription
build Inquisit version number
computer.platform Device platform: win | mac |ios | android
computer.touch 0 = device has no touchscreen capabilities; 1 = device has touchscreen capabilities
computer.hasKeyboard 0 = no external keyboard detected; 1 = external keyboard detected
date Date the session was run
time Time the session was run
subject Participant ID
group Group number
session Session number
blockcode The name the current block (built-in Inquisit variable)
blocknum The number of the current block (built-in Inquisit variable)
trialcode The name of the currently recorded trial (built-in Inquisit variable)
trialnum The number of the currently recorded trial (built-in Inquisit variable)
trialnum is a built-in Inquisit variable; it counts all trials run
even those that do not store data to the data file.
targetCategory 1 = PA 1000 trial; 2 = SS 1000 trial; 3 = PE 1000 trial; 0 = other
testTrial 0 = practice/training; 1 = testtrial (trialCount >= 20 in each testblock)
stimulusItem The presented stimuli in order of trial presentation
response The participant's response (57 = spacebar; 0 = noResponse)
correct The correctness of the response (1 = correct; 0 = incorrect)
latency The response latency (in ms); measured from onset of stims