Recent theoretical models of obsessive-compulsive disorder (OCD) have emphasized a fundamental role for decision making deficits in the disorder, and emerging neurobiological findings suggest that OCD is associated with functional abnormalities in the way the brain processes decision-relevant information. Prior studies have found that OCD is associated with a tendency to defer decisions until a greater quantity of decision-relevant information has been acquired. This study sought to assess the effects of information cost on information acquisition and to model information purchases using simple decisional heuristics drawn from the cognitive science literature. Participants with varying levels of obsessive-compulsive (OC) symptoms completed a multiattribute decision making task in which they could purchase decision-relevant information from 5 differentially-useful sources. Higher OC symptoms were associated with more errors, inconsistent choices, and a random response style. OC symptoms also were associated with reduced cue order perseveration and increased search order reorganization, particularly during later training blocks; these findings remained statistically significant even after controlling for differences in indecisiveness, intolerance of uncertainty, perfectionism, and total errors. OC symptoms were unrelated to total earnings, information purchases, cue deliberation times (i.e., latencies), or the number of decisions consistent with one-reason decision making. Moreover, OC symptoms were unrelated to the acquisition of cue orders that reflected environmental validity, discrimination, or success ratios. Overall, the Tally Swap heuristic obtained the best fit for participant data. Higher OC symptoms were associated with poorer fit of the Tally Swap heuristic for predicting information purchases during later decision trials; no group differences in fit were observed for the Take the Last, Tally, or Validity heuristics. Finally, higher OC symptoms were associated with greater indecision, intolerance of uncertainty, perfectionism, and a greater tendency to maximize ideal outcomes and avoid regret. Potential neurocognitive explanations for these findings (e.g., selective attention, working memory, planning, underlying neural circuitry) are discussed. This study advances our understanding of multiattribute decision making in obsessive-compulsive disorder and provides some of the first evidence linking individual differences in information search behavior to psychopathology.