iPad task and physiology (40-minute timepoint)

The dataset ipad contains tablet-based task performance measures, pupillography features, blood cannabinoid metabolite concentrations, and cardiovascular measures collected 40 minutes after smoking (or after a rest period for controls). Each row is one participant at this timepoint. The identifier id has been converted to a factor, and the data have been filtered to timept = 2 only.

Usage

data(ipad)

Format

A tibble, one row per participant at timepoint 2. Variables are grouped below.

Identifiers

id

Participant identifier (factor).

timept

Timepoint indicator (fixed at 2 = 40 minutes).

use_group

Participant use group: 1 = Daily, 2 = Occasional, 3 = No Use.

recent_smoke

Recent use at this timepoint: 0 = No Use, 1 = Use.

Blood (metabolite concentrations)

t_thc, t_thc_oh, t_thc_cooh, t_thc_gluc, t_thc_cooh_gluc, t_cbg, t_cbd, t_cbn, t_mmr1, t_mmr2.

Pupillography

p_fpc1–p_fpc6 (functional pupil components 1–6); p_PMC_pctChg (percent change at point of minimum constriction); p_auc (AUC of the pupillary constriction curve).

Tablet (task metrics)

i_prop_false_timeout, i_prop_failed1, i_prop_failed2, i_judgement_time1, i_judgement_time2, i_time_outside_reticle, i_time_on_edge, i_prop_hit, i_correct_reaction2, i_reaction_time_max2, i_reaction_time2, i_rep_shapes12, i_rep_shapes34, i_memory_time12, i_memory_time34, i_composite_score.

Cardiovascular

h_hr (heart rate), h_dbp (diastolic blood pressure), h_sbp (systolic blood pressure).

Details

Participants completed an iPad test assessing reaction time, decision making, working memory, and spatial-motor performance before and after cannabis use (or a rest period for controls). This dataset retains the post (40-minute) measurements only. Consider converting use_group and recent_smoke to factors with informative labels for modeling/plotting. Units for biochemical and physiological variables follow the original source.

References

Smith, S. J., Wrobel, J., Brooks-Russell, A., Kosnett, M. J., & Sammel, M. D. (2023). A Latent Variable Analysis of Psychomotor and Neurocognitive Performance After Acute Cannabis Smoking. Cannabis (Albuquerque, N.M.), 6(2), 123–132. doi:10.26828/cannabis/2023/000156

Examples

data(ipad)