A between-subjects randomised controlled trial, in online purchasing context. Participants were adults (n=661) over the age of 18, who regularly purchased alcohol online. Participants were randomised to one of six groups in a between-subjects three [health warning labels (HWLs) (i): image-and-text HWL; (ii) text-only HWL; (iii) no HWL] × 2 (calorie labels: present versus absent) factorial design (n per group 103–113). Participants completed a shopping task, they selected drinks in a simulated online supermarket, before purchasing them in an actual online supermarket The primary outcome was the number of alcohol units selected (with intention to purchase); secondary outcomes included actual purchasing.

The deposit includes the following files:

LabellingAlcoholPurchasing_PROTOCOL_210809 LabellingAlcoholPurchasing_SAP_210809 LabellingAlcoholPurchasing_PIS_210809 LabellingAlcoholPurchasing_DEBRIEF_210809 LabellingAlcoholPurchasing_CONSENT_210809 LabellingAlcoholPurchasing_OriginalDatabase_211109 deposit_licence_agreement_2_1.pdf

Data can be opened in Excel. It contains a data dictionary which defines the contents of the data comprehensively.

Currently (March 2024) SPSS software can be downloaded for free by staff and students at the University of Cambridge here (you must be signed in):

https://www.ch.cam.ac.uk/computing/software/ibm-spss-statistics