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Here we define the key variables in the dataset:
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-PO, POC and POnoC contain the marginal and conditional probabilities of the outcome, P(O), P(O|C) and P(O|~C), for all trials.

-POAmb, POCAmb, POnoCAmb contain the equivalent information, but for ambiguous trials only.

-POnoAmb, POCnoAmb, POnoCnoAmb contain the equivalent information, but for non-ambiguous trials only.

-DP, DPAmb, and DPnoAmb are the values of the DeltaP index computed for all trials, ambiguous trials, and non-ambiguous trials.

-CellT01 to CellT40 contain the cell type (a, b, c, d) for each trial. Ambiguous trials are represented as "AmbiguoClave" (cue-present ambiguous trials) and "AmbiguoNoClave" (cue-absent ambiguous trials).