Ways in which chemical techniques could be applied to the understanding of neural systems, their functioning and their disorders were devised only gradually during the present century. In a particularly successful procedure, now termed assay-guided isolation, neural defects were made good by means of tissue-extracts and the restoration of function was established as an assay-system to guide the chemical separation and identification of the active tissue constituent. Thiamin was so isolated, using an experimental polyneuritis assay; subsequent instances among other metabolites, hormones, neurotransmitters and nerve growth factors are recounted. Procedures of assay-guided characterization ensured that links were retained between specific, sparsely-occurring substances and chosen aspects of their biological roles while their chemical nature was first explored and then established. The procedures discouraged the too-facile postulating of hypothetical molecules and contributed to the distinctiveness of neurochemistry as a subject within the neurosciences.

Using computed tomography, lateral ventricular size was studied in a sample of 112 institutionalized chronic schizophrenic patients (selected from 510 cases to investigate the correlates of the defect state and intellectual decline and the effects of insulin, electroconvulsive and neuroleptic treatment), and compared with matched groups of non-institutionalized schizophrenics, patients with first schizophrenic episodes, institutionalized and non-institutionalized patients with primary affective disorder, and neurotic out-patients. Age was significantly correlated (P < 0·0002) with lateral ventricular size, but the institutionalized schizophrenic patients had significantly larger (P < 0·025) lateral ventricles than the neurotics when age was taken into account. Ventricular enlargement was unrelated to past physical treatment (neuroleptics, insulin coma and electroconvulsive therapy).

Within the group of institutionalized schizophrenic patients few correlates of ventricular enlargement were identified; thus in this population increased ventricular size was not clearly associated with the features of the defect state (negative symptoms and intellectual impairment). however, there was a curvilinear (inverted-U) relationship between intellectual function and ventricular size was significantly related to absence of hallucinations, impairment of social behaviour, inactivity and the presence of abnormal involuntary movements.

The findings confirm that structural brain changes do occur in chronic schizophrenia, but illustrate some of the difficulties in elucidating the clinical significance of ventricular enlargement. Lateral not bimodal; the relationship to particular features of the disease is complex and likely to emerge only in studies with a large sample size.

Cavities in the septum pellucidum are widely regarded as incidental findings of little clinical importance. The prevalence of such cava on computerized tomography in a mixed sample of 22000 neurological and psychiatric patients is found to be 0·15%. A statistical association between this anomaly and a referral diagnosis of functional psychosis is reported, and 6 cases are described. These cases were male and characterized by an early history of developmental delay, with lifelong disturbances of emotion and behaviour prior to the onset in early adulthood of an atypical schizophrenia-like psychosis with disorders of speech and movement. It is suggested that septal cavities may signal an underlying abnormality of function relevant to the pathogenesis of these illnesses.

Tests of thyroid function and pathology were carried out on 133 patients before they were treated with lithium (Li+). Of the 12 patients who subsequently became hypothyroid during treatment with lithium 9 had, before the commencement of treatment, thyroid autoantibodies and/or an exaggerated thyroid stimulating hormone (TSH) response to thyrotropin releasing hormone (TRH), whereas 3 patients had neither of these indicators. Lithium administration was accompanied by a rise in thyroid antibody titre in 20 patients but a fall in only 5, a statistically significant difference. Evidence that it may be an immunostimulant is discussed. Li+-induced thyroid failure cannot be accurately predicted, and may occur suddenly. The best minimum safeguard, therefore, is serial thyroxine (T4) (or free T4) estimation, supplemented if equivocal by a free thyroxine index (FTI), a basal TSH and, if doubt remains, by a TRH test.

A twofold increase in the prevalence of depression among women has been consistently observed. Several possible explanations, including methodological, endocrine, psychosocial, and genetic factors, have been proposed for the increased rates of depression among women. This paper describes the analysis of data from a family-genetic study of depressed probands to examine whether genetic factors can explain the preponderance of depressed females. Our data indicate that the excess of females with major depression cannot be attributed to increased genetic loading for depression in women. Other factors which may explain increased rates of major depression in women are discussed.

The study examined the performance of positive symptom schizophrenics vis à vis that of demographically well-matched negative symptom schizophrenics and normals in organizing words into ideas and ideas into integrated spoken discourse. This involved applying a series of analyses to speech produced when describing pictures in an unconstrained way. The results showed that, for the most part, positive symptom schizophrenics organized their speech, both within and between ideas, as well as negative symptom schizophrenics and normals. The results did, however, show an increased tendency by the positive speech disordered schizophrenics to omit referents for noun phrases requiring referents. This constitutes a specific failure to connect ideas and does, at least in part, explain what makes positive speech disorder (incoherence of speech) unintelligible. However, taken altogether, the results do not support the extant view that positive symptom schizophrenics suffer from a general loss of control in producing speech.

A battery of tests was developed to assess verbal, non-verbal and mixed cognitive functions. Interest was based on pattern of response rather than absolute scores. The subjects were 167 men held in prison on criminal charges or in a maximum security hospital after conviction. The present paper deals exclusively with two subgroups: the 61 schizophrenic men and the 41 men with no psychiatric disorder. The schizophrenic group as a whole presented a very different cognitive pattern from the ‘normal’ men. First, with the exception of the vocabulary subtest of the WAIS, the schizophrenics were inferior on all tests, whether verbal, non-verbal or mixed function. Secondly, they showed considerably more variation within subtests. The schizophrenic sample was therefore subdivided into four clinical groups. Each showed a distinctive cognitive profile. It is argued that these cognitive differences reflect real differences in the disorder and type of illness being experienced by members of these subgroups.

A computer programme (DPAX) was constructed for a longitudinal study of psychiatric epidemiology in Stirling County (Canada). It identifies disorders involving the syndromes of depression and anxiety based on responses given in structured questionnaire interviews. The programme follows a diagnostic algorithm that uses criteria for: (1) essential features; (2) number, frequency, and pattern of associated symptoms; (3) impairment; and (4) duration. The programme reproduces case evaluations provided by psychiatrists, as conveyed by a sensitivity of 92% and a specificity of 98%.

The ecological association between unemployment and parasuicide rates among males in Edinburgh over the period 1968–82 was positive and highly significant (r = 0·77). Similarly, the two rates were found to be correlated across the city wards in 1971 (r = 0·76) and even more strongly in 1981 (r = 0·95). Throughout the period the parasuicide rate among the unemployed was nearly always more than 10 times higher than that among the employed. The long-term unemployed were at much higher risk than those out of work for lesser periods, although the impact of recent job loss was marked. Population attributable risk has shown a tendency to rise in line with the upward trend in the unemployment rate, despite the decline in relative risk over the period. The findings were considered consistent with the view that unemployment increases the parasuicide rate.

In a recent study Turner et al. (1983) employed Bell & Byrne's (1978) Repression-Sensitization (R–S) scale to test the hypothesis that agoraphobics utilize repression as a method of avoiding anxiety-arousing forms of cognition. However, no support was found for this view. Rather, the R–S scores indicated general sensitization and attention to negative affect. In this paper it is argued that, on both theoretical and psychometric grounds, the R–S scale cannot be considered a suitable measure of the repression–sensitization process. A study was carried out in which a number of other defensivity measures were used in addition to the R–S scale. Weak support was found for Goldstein & Chambless’ (1978) view that a defensive cognitive style is characteristic of agoraphobic patients when compared with non-phobic psychiatric controls.

This paper is a preliminary investigation into the application of Q-analysis in clinical psychiatry, Q-analysis is used to describe the interrelationships of attitudes that two groups of patients were observed to hold towards ECT. The data were collected as part of the Leicestershire ECT trial. One group comprised 96 patients who consented to enter the trial. The other group was formed by 23 patients who refused to participate in the trial, but who agreed to be interviewed so that their attitudes could be assessed.

The method of applying Q-analysis is described, and the resultant outputs for the two groups are discussed. The presence of insight, a subjective need for treatment and trust in ECT were significant features in the 96 patients who agreed to enter the trial. However, among this group there was a subset of patients who were very anxious and who had little desire to receive ECT or trust in it. Among the 23 patients who refused to participate in the trial two main viewpoints could be discerned. First, there was a subgroup who seemed accurately to assess their need for treatment, had insight and trust in ECT as well as specifically wanting to receive it. The second was composed of patients who were very apprehensive, did not want ECT and generally were unhappy about being in hospital. In both groups it was considered that level of knowledge was relatively unimportant in the formation of attitudes.

The 40-item Eating Attitudes Test (EAT-40) was administered to teenage schoolgirls. Factor analysis (N = 749) yielded a major dieting factor almost identical to that found by Garner et al. (1982) with anorexics. Although this factor clearly measures pathology in underweight girls, its interpretation is ambiguous for normal and overweight girls. Two other factors found in all analyses were food preoccupation and social pressure to eat.

The English and Chinese versions of the General Health Questionnaire (GHQ) were administered to a sample of 72 bilingual respondents for the evaluation of version equivalence by a series of item analyses, reliability analyses and factor analyses. Although certain notable discrepancies were observed at the item level, the two versions were found to be comparable at the scale level. In addition, cogent evidence was provided for the relative robustness of the symptom dimensions as assessed by the two versions of the GHQ.

Sixty-four children taken to court for failure to attend school were reliably classified into 4 groups, according to whether they exhibited the features of ‘school refusal’ and/or ‘truancy’. About a fifth of them were found to exhibit ‘school refusal’; a third showed ‘truancy’; less than a sixth exhibited both ‘school refusal’ and ‘truancy’ combined; and over a third had the characteristics of neither condition. Differences between these categories were found in manifestations of psychiatric disturbance and in responsiveness to a court adjournment procedure.

Data from a non-participant, ‘event-sampling’, direct observation study of 32 elderly persons in residential care were simplified and re-analysed, with the aim of developing a short, practical method of observation for use in research and training in residential care. A single, nominated hour's observation seemed to fit the data satisfactorily. This method, when applied to data from two newly observed contrasting samples, revealed the same important differences as had been found from a whole day's observation. A practical, short observation method thus emerged for use in research and training.

Clinical descriptions of families are often viewed as being too subjective for systematic scientific inquiry. This study examines the extent to which independent observers can recognize statements made about family interactions. These statements were of a type which clinicians dealing with families would make and comprised observations with varying levels of inference. A special method was devised to test a number of specific hypotheses concerning the processes of clinical observation. The results show that such descriptions are recognizable as being made about a particular family even when this involves discriminating between clinically similar families. Some of the implications of these results for observational research are discussed.

In a survey of a random sample of the general population recent life events, collected and rated for long-term contextual threat according to the methods of Brown & Harris (1978), were also recorded where possible on an inventory of life event categories (Tennant & Andrews, 1977). Of the 82·5% of all events collected which were covered by the inventory, 12 of the 67 event categories accounted for 77% of life events with an aetiologicaly significant rating of marked or moderate long-term threat. Where practical and economic constraints oblige research workers to choose the inventory method, a brief list of event categories, such as the List of Threatening Experiences, is recommended in preference to much longer lists.