the theory indicates that the predictions are supported. Data have, however, been ambiguous, and some researchers believe that the theory is well-supported, some believe that it has not had impressive empirical support and some believe that, at least in the early days of the theory, the theory was never adequately tested. One factor accounting for ambiguity in research into the model is whether researchers have assessed attributions for hypothetical events or for real events. Those studies that have looked at attributions for hypothetical events have been more supportive of the model, possibly because these studies are more likely to have controlled for event severity. The "learned helplessness" model formed the theoretical basis of the original Abramson, Seligman, and Teasdale statement on attributional style. More recently, Abramson, Metalsky and Alloy proposed a modified "hopelessness theory". This distinguished hopeless depression and more circumscribed pessimism. It emphasizes the dimensions of stability and globality rather than internality, and suggests that stable and global attributions (rather than internal cause attributions) are associated with hopelessness depression. Hopelessness theory also highlights perceived importance and consequences of a negative outcome in addition to causal attributions as factors in clinical depression. Developmentally, it has been suggested that attributional style originates in experiences of trust or lack of trust in events Along with evidence from twin studies for some heredity basis to attributional style., Eisner argues that repeated exposure to controllable events may foster an optimistic explanatory style, whereas repeated exposure to uncontrollable events may foster a negative attributional style. Trust in interpersonal relationships is argued to build an optimistic explanatory style. Measurement Attributional style is typically assessed using questionnaires such as the Attributional Style Questionnaire or ASQ, which assesses attributions for six negative and six positive hypothetical events, the Expanded Attributional Style Questionnaire or EASQ, which assesses attributions for eighteen hypothetical negative events, and various scales that assess attributions for real events, such as the Real Events Attributional Style Questionnaire or the Attributions Questionnaire. Although these scales provide empirical methodology for study of attributional style, and considerable empirical data support the Abramson–Seligman–Teasdale model of depression, there has been dispute about whether this concept really exists. Cutrona, Russell and Jones, for example, found evidence for considerable cross-situational variation and temporal change of attributional style in women suffering from post-partum depression. Xenikou notes, however, that Cutrona, Russell and Jones found more evidence for the cross-situational consistency of stability and globalism than