The Shellen chart as a test of visual acuity

Summary An analysis of the mistakes made by 100 boys in reading the letters on a Snellen Chart reveals great differences in legibility between letters of the same size. This is found to depend on the shape and familiarity of the letter and its similarity to other letters. Whether a test of visual acuity consists of two-point discrimination or the perception of meaningful shapes, mental organization is a deciding factor in determining the response. While oculists are interested in the part played by the eye in vision, psychologists direct attention to the part played by the mind.Based on a paper read at the British Association Meeting at Newcastle in September, 1949.     

A political economy of the Poor People’s Campaign: From MLK and Polanyi to Trump

ABSTRACT

A stalemate has emerged in mainstream liberal/left responses to Trump. Many commentators prefer to see our predicament in terms of either class-based or identity politics. Vis-à-vis the influence of the Chicago school of economics and its structural adjustment schemes, we crosshatch MLK’s Poor People’s Campaign and Polanyi’s Great Transformation to envision overcoming this stalemate. King’s effort to radicalize the welfare state from below by linking struggles against poverty, racism, and imperialism shares Polanyi’s focus on the economy’s embeddedness in society. We underscore the importance of King’s and Polanyi’s visions for building a leftist coalition that does not divorce social from economic justice.     

Identification of Nearly Fatal Suicide Attempts: Self-Inflicted Injury Severity Form

The Self-inflicted Injury Severity Form (SIISF) was developed as an epidemiological research tool for identifying individuals in hospital emergency departments who have life-threatening self-inflicted injuries. Data were collected from 715 patients with self-inflicted injuries in two large hospitals. In 295 of these cases, a second set of data was independently collected for assessment of interrater reliability. Validity was assessed by comparing the SIISF results with simultaneously collected Risk—Rescue Ratings. Assessment of interrater reliability found that only 2.4% of physicians disagreed on the suicide method used. The kappa statistic for method used was .94, indicating excellent agreement. The SIISF was found to distinguish between severe and less severe injuries. Thus, it appears to provide a simple method to distinguish patients who have life-threatening self-inflicted injuries.     

Victimization of Lesbian,Gay, and Bisexual People in Childhood: Associations with Attempted Suicide

Higher rates of attempted suicide have been documented among people who identify themselves as gay, lesbian, and bisexual (LGB) compared with heterosexuals. This study sought to ascertain the association between childhood abuse and neglect and attempted suicide, comparing LGBs and heterosexuals. Childhood sexual abuse among men and childhood sexual and physical abuse among women were found to mediate the association between LGB identity and attempted suicide. The experience of childhood abuse likely plays a significant role in the relationship between LGB identity and attempted suicide, but other factors such as experience of discrimination are also important.     

The Influence of Geographic Mobility on Nearly Lethal Suicide Attempts

T eenagers and young adults are very mobile and mobility has been identified as a potential risk factor for suicidal behavior. We conducted a population‐based, case‐control study of nearly lethal suicide attempts with 153 cases and 513 controls. Study participants were asked about changing residence over the past 12 months. Results indicate that moving in the past 12 months is positively associated with a nearly lethal suicide attempt (adjusted odds ratio of 2.1, with 95% confidence interval of 1.4–3.3), as are specific characteristics of the move (e.g., frequency, recency, distance, and difficulty staying in touch). These findings confirm and extend prior ecologic research by demonstrating a relationship, at the individual level, between the geographic mobility of adolescents and young adults and nearly lethal suicide attempts.