Dataset for study: Cleaning up our acts: Psychological interventions to reduce engine idling and improve air quality
2020
List and descriptions of the variables included (the same information appears to tab2 of the Excel document)
Observation - observations numbered
Condition - "experimental condition: 0 = baseline, 1 = social norm, 2 = outcome efficacy, 3 = private self-focus"
simple_baseline - dummy contrast code used to assess the effect of Number of vehicles in the Baseline condition
simple_norm - dummy contrast code used to assess the effect of Number of vehicles in the Social Norm condition
simple_efficacy - dummy contrast code used to assess the effect of Number of vehicles in the Outcome Efficacy condition
simple_selffocus - dummy contrast code used to assess the effect of Number of vehicles in the Private Self-Focus condition
Location - location at which data were collected, 1 = Location 1, 2 = Location 2
Date - date of observation (MM/DD/YYYY)
Date_num - date of observation numbered from 1 (1st observation day) to 17 (last observation day)
Session - represents one barrier drop, numbered from 1 for each observation day (used for multilevel grouping)
Vehicle_type - type of vehicle, 1 = car, 2 = bus, 3 = lorry, 4 = motorbike, 5 = service vehicle, 6 = van, 7 = taxi
Number_vehicles - number of vehicles queuing at one location, for each barrier drop (session)
temperature - average temperature measured for the duration of the barrier drop
humidity - average humidity measured for the duration of the barrier drop
NO2 - average NO2 concentration level measured for the duration of the barrier drop
O3 - average O3 concentration level measured for the duration of the barrier drop
PM25 - average PM2.5 concentration level measured for the duration of the barrier drop
logNO2 - logarithmic transformation of NO2
logO3 - logarithmic transformation of O3
logPM25 - logarithmic transformation of PM25
Engine_off - whether engine is on or off, 0 = engine on, 1 = engine off
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