Self-poisoning patients (n = 40) were compared with psychiatric patients (n = 40) and nonpatient controls (n = 20) on measures of interpersonal problem-solving skills and locus of control in an effort to determine the importance of these cognitive and personality variables in self-poisoning behavior. The psychiatric and self-poisoning groups showed deficits on measures assessing interpersonal problem solving when compared with nonpatient controls. The self-poisoning group performed below the level of the psychiatric patients on all except one test, on which they performed at the level of the psychiatric group. Locus of control did not differentiate self-poisoning patients from nonpatient controls, and it was concluded that this variable is not an important factor in self-poisoning behavior.

This brief intervention for self-harm is no more effective than treatment as usual. Further work is required to establish whether a modified, more intensive programme delivered sooner after the index episode would be effective.

Purpose. This study was designed to explore relationships that exist among suicidal ideation, perceptions of the prison environment and problem‐solving deficits in an offender population. Method. Participants were 46 male offenders in two separate prisons in the Republic of Ireland. A semistructured interview ascertained demographic and personal history details. Participants were (i) non‐ideators with no previous parasuicide history (control group), (ii) non‐ideators with a past parasuicide history (past parasuicide group), and (iii) current ideators. Participants completed the Beck Depression Inventory II, Beck Hopelessness Scale, Beck Suicidal Ideation Scale, Means‐Ends Problem‐Solving Scale and Prison Preference Inventory. Results. Participants in the current ideator and past parasuicide groups had significantly higher preferences for privacy and significantly lower preferences for social stimulation within the prison environment than did the control group. There were no significant differences in the number of problem‐solving means produced among the three groups. Participants in the control group offered significantly more active relevant problem‐solving means than did participants in the other two groups. The current ideator group produced significantly more passive relevant problem‐solving means than did the past parasuicide and control groups. Conclusions. The significant differences in perceptions of the prison environment may be indicative of different coping mechanisms used to adapt to time in prison. It is concluded that the lack of significant differences in the generation of passive relevant problem‐solving means are related to parasuicide history. The lack of significant differences in the number of problem‐solving means produced is accounted for by the prevalence of problem‐solving deficits among an offender population.

Poor optional thinking is associated with increased risk of repeated deliberate self-harm in those who present with a first self-harm episode. Interventions to improve optional thinking skills, delivered soon after a first DSH presentation, may be useful in preventing repetition.