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.
data(ipad)A tibble, one row per participant at timepoint 2.
Variables are grouped below.
idParticipant identifier (factor).
timeptTimepoint indicator (fixed at 2 = 40 minutes).
use_groupParticipant use group: 1 = Daily, 2 = Occasional, 3 = No Use.
recent_smokeRecent use at this timepoint: 0 = No Use, 1 = Use.
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.
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).
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.
h_hr (heart rate), h_dbp (diastolic blood pressure),
h_sbp (systolic blood pressure).
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.
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. tools:::Rd_expr_doi("10.26828/cannabis/2023/000156")