Data and Analysis Unit: EXE13
Last update: 2016-02-22 by Andy Wills
Description
Categorization experiment, reported as Experiment 1A in Wills et al. (2009) This DAU contains raw data, and an analysis script, in open cross-platform formats (see the file format notes)Citation and License
Please cite Wills et al. (2009) when using this resource. Please also cite the resource itself, as it was produced after Wills et al. (2009) was published and hence is not linked from Wills et al. (2009)The APA-format citation for this resource is:
Wills, A.J. (2016). Data and Analysis Unit: EXE13. Retrieved from http://www.willslab.co.uk/exe13
DAU: EXE13
by Andy J. Wills is licensed under
a Creative Commons
Attribution-ShareAlike 4.0 International License. This licence
covers all materials listed and hyperlinked on this page (data,
stimuli, analysis scripts, source code, etc.).
If you make use of these resources, please drop me an email: andy@willslab.co.uk.
Resources
- exe13clar.txt (3 KB) - Some clarifications of the Method and Results of this experiment.
- exe11stims.tar.bz2 (705 KB) - Stimulus image files. Filenames are of the form 'A8----x.png', where '----' is the four-digit code used in the raw data file (see below). 'A8' is an irrelevant prefix, 'x' is an irrelevant single-digit suffix. These are the same files as used in EXE11 (Exp. 1B in Wills et al. (2009).
- exe13analysis.R (9 KB) - R script replicating and updating the central results of Experiment 1A reported in Wills et al. (2009).
- exe13data.csv (3.1 MB) -
Trial-level behavioural raw data. Column headings are as follows:
- date: Date of testing session (in YYYY-MM-DD format)
- subj: Two letter bird-identifying code (e.g. "As"). Codes correspond to those used in Wills et al. (2009, Exp. 1A).
- keyb: Response counterbalance condition. There are two conditions, 'left' and 'right'.
- phase: Experiment phase:
- Single-dimension training
- Prototype training
- Test phase 1
- Reacqusition phase 1
- Test phase 2
- Reacqusition phase 2
- Test phase 3
- Reacqusition phase 3
- Test phase 4
- Reacqusition phase 4
- Test phase 5
- Reacqusition phase 5
- Test phase 6
- sess: Session number.
- trial: Trial number; resets at start of each session.
- snum: Do not use this column. It contains errors - see exe13clar.txt.
- stim: Four-digit code for physically-presented stimulus
(same codes as for EXE11 ie. Wills et al. (2009, Exp
1B). Phase-specific:
- Phase 1: Single-attribute stimuli. Counting from the left:
- 1st digit: bar: 0 = absent, 1 = long, 2 = short
- 2nd digit: checks: 0 = absent, 1 = coarse, 2 = fine
- 3rd digit: doughnut: 0 = absent, 1 = large, 2 = small
- 4th digit: lozenge: 0 = absent, 1 = convex, 2 = concave
- Phases 2-3: Three-attribute stimuli. Counting from the left, the digits refer to physical locations within this stimulus:
- 1st digit: top stimulus attribute
- 2nd digit: left stimulus attribute
- 3rd digit: right stimulus attribute
- 4th digit: Always zero
- 1: lozenge: convex
- 2: doughnut: large
- 3: bar: long
- 4: checks: coarse
- 5: lozenge: concave
- 6: doughnut: small
- 7: bar: short
- 8: checks: fine
- Where a session is empty or missing (see below), stim is set to 'S' or 'SNA'.
- vtft: The time interval (in seconds) between onset of the response stimuli and the time at which the participant's responses have a scheduled consequence (i.e. are not ignored).
- ftpks: The number of responses made by the participant during the vtft interval.
- pk1acc: The status of the first response made by the participant to the response stimulus after the vtft interval (see above) had expired. Depends on stimulus type:
- Training stimuli:
- * : correct response
- + : Incorrect response
- $ : No response made after the vtft interval
- Test stimuli:
- L : response on left key
- R : response on right key
- totpks: The total number of responses made by the participant to the response stimulus after the vtft interval (see above) had expired.
- pos1rt: The latency of the first left-key response to the response stimulus, measured from response stimulus onset (i.e. includes ignored responses). -1 indicates no responses of this type on this trial.
- neg1rt: The latency of the first right-key response to the response stimulus, measured from response stimulus onset (i.e. includes ignored responses). -1 indicates no responses of this type on this trial.
- fc: Normally empty, if there is a character in this field,
it indicates the following:
- F : A forced-choice trial (i.e. the trial does not end until the bird makes the correct response). There is no entry in pk1acc for these trials.
- empty : A session for which the bird was placed in the testing chamber but no responses were emitted.
- missing : A session for which the data was not recorded.
- fault : A session during which one or both of the food delivery hoppers malfunctioned. The reinforcment of the birds in these sessions is thus not according to the schedule and may be largely absent.
- pz1 : Number of pecks to stimulus zone 1 (top) during the observing response. Meaningless for single-element stimuli of phase 1, and hence recorded as -1 for that phase.
- pz2 : Number of pecks to stimulus zone 2 (left) during the observing response. Meaningless for single-element stimuli of phase 1, and hence recorded as -1 for that phase.
- pz3 : Number of pecks to stimulus zone 3 (right) during the observing response. Meaningless for single-element stimuli of phase 1, and hence recorded as -1 for that phase.
- lsess : Do not use this column. It contains errors - see exe13clar.txt
References
- Wills, A.J., Lea, S.E.G., Leaver, L.A., Osthaus, B., Ryan, C.M.E., Suret, M.B., Bryant, C.M.L., Chapman, S.J., & Millar, L. (2009). A comparative analysis of the categorization of multidimensional stimuli: I. Unidimensional classification does not necessarily imply analytic processing; evidence from pigeons (Columba livia), squirrels (Sciurus carolinensis), and humans (Homo sapiens). Journal of Comparative Psychology, 123, 391-405.