This is the first study to empirically investigate the heuristic model of dysphoric dreaming proposed by Levin and Nielsen (2007) . Participants indicated their incidence of nightmares (NMs) and bad dreams (BDs) over 21 days, and rated their subsequent distress in daily dream logs. Results support the contention that the 2 constructs identified in the model, affect load (AL) and affect distress (AD), underlie NM production and are active in both the waking and sleeping states. As predicted, AL accounted for more unique variance to the prediction of incidences of disturbed dreaming (DD), whereas AD accounted for more unique variance to the prediction of distress over NMs and BDs. Taken together, these findings are consistent with Levin and Nielsen's (2007) model and bolster earlier findings that suggest that distress about DD remains a crucial component in the relation between DD frequency and waking psychopathology.

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Despite an abundant literature on disturbed dreaming (DD) incidence and psychopathology, little is known about the pathogenesis of these dream disturbances. Recent work strongly suggests that DD distress may be the primary determinant of the relationship between DD and waking psychological impairment. This is the first empirical investigation of the possible role of somatic distress as a crucial pathway in this relationship. A total of 313 college undergraduates completed 3 measures of somatic distress (SCL-90-R Somatization scale, Somatic Interpretations Questionnaire and the Anxiety Sensitivity Index) and then monitored their DD incidence and distress for 21 consecutive days. It was predicted that high levels of somatic distress would be associated with heightened levels of both DD incidence and distress. Although the results were somewhat mixed, individuals who reported more incidents of both bad dreams and nightmares did indeed report higher levels of somatic distress. The results were largely consistent with our predictions and the findings are discussed with regard to recent modeling by in identifying key cognitive diatheses for the development of DD.

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