When assessed within each group, the correlation was significant for smokers only (smokers: r = 0.54, CI 95% [0.12, 0.79], t(18) = 2.69, p = 0.015; non-smokers: r = 0.07, p = 0.76, n.s.), though the difference between correlations did not reach statistical significance (Fisher’s z = 1.533, p = 0.125).
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Pupil size as a robust marker of attentional bias toward nicotine-related stimuli in smokers.
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