lawson: Lawson et al. (2017) Freesort Dataset
In freesortphi: Cramer's Phi Analysis of Freesort Data

Description Usage Format Details Author(s) Source Examples

Data from Experiment 1 of Lawson et al. (2017), a free sort of a large set of everyday objects (140 items) by 30 adult participants.

1	data("lawson")

A data frame with 4200 observations on the following 5 variables.

ExptGroup: Experimental condition. 1 = pictures, 2 = words.
SjNo: Participant Number
CategoryNo: Category number
ItemNo: Stimulus number, range: 1-140
ItemName: Stimulus name

Lawson et al. (2017, Exp. 1) asked 30 adult participants to sort 140 everday objects into groups. Participants in the 'words' condition sorted cards with the words listed in ItemName printed on them. Particiants in 'pictures' condition sorted cards with color pictures depicting those words. The pictures are not reproduced here for copyright reasons.

For each participant, CategoryNo ranges from 1 to the number of groups that participant created. Within a given participant, items with the same category number were put into the same group. The number itself is arbitrary (e.g. the number does not indicate which group was formed first, there is no planned correspodence between a particular category number across participants, etc).

Andy J. Wills (andy@willslab.co.uk)

Lawson, R., Chang, F. & Wills, A.J. (2017). Free classification of large sets of everyday objects is more thematic than taxonomic. Acta Psychologica, 172, 26-40.