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J Halberstadt

Publications and source records attributed to J Halberstadt.

6 recordsLinked to original sources
PubMed2000

The attractiveness of nonface averages: implications for an evolutionary explanation of the attractiveness of average faces.

Researchers have argued that humans' attraction to average faces reflects an evolved psychological mechanism to identify high-quality mates. If this direct-selection account is correct, there is no reason to expect a similar averageness bias for stimuli that are irrelevant to reproductive fitness. The current study, however, found a strong relationship between averageness and attractiveness for dogs, wristwatches, and birds. The most parsimonious explanation is that humans have a general attraction to prototypical exemplars, and that their attraction to average faces is a reflection of this more general attraction. We tested whether a general preference for familiar stimuli can account for the attractiveness of averageness. This account was not supported for dogs or birds, but could not be ruled out for watches.

Adult↗
PubMed1997

Similarity in context.

Similarity comparisons are highly sensitive to judgment context. Three experiments explore context effects that occur within a single comparison rather than across several trials. Experiment 1 shows reliable intransitivities in which a target is judged to be more similar to stimulus A than to stimulus B, more similar to B than to stimulus C, and more similar to C than to A. Experiment 2 explores the locus of Tversky's (1977) diagnosticity effect in which the relative similarity of two alternatives to a target is influenced by a third alternative. Experiment 3 demonstrates a new violation of choice independence which is explained by object dimensions' becoming foregrounded or backgrounded, depending upon the set of displayed objects. The observed violations of common assumptions to many models of similarity and choice can be accommodated in terms of a dynamic property-weighting process based on the variability and diagnosticity of dimensions.

Chi-Square Distribution↗
PubMed1990

[Evaluation of the treatment of aneurysmal meningeal hemorrhage with antifibrinolytic agents, calcium inhibitors and maintenance of effective blood volume].

To prevent and treat the ischemic complications due to the vasospasm, this report suggest the management of aneurysmal subarachnoid haemorrhage by the association of antifibrinolytics (tranexamic acid) to lower the risk of rebleeding, calcium channel blockers (nimodipine), and the keeping of an effective total blood volume (thanks to volume expansion and dopamine). From 88 patients aged from 4 to 73, two thirds were admitted at latest 48 h after the aneurysmal rupture Emergency surgery was carried out in the case of a compressive hematoma, early surgery (between the first and the third day) on the grades I, II and III of Hunt and Hess without any signs of angiographic vasospasms (40% of this series), delayed surgery for the others (27.5%), 10% didn't undergo any surgery. Only three patients (3.4%) presented rebleeding leading to death. The features of the whole series are: 51% recovered without any after effects, 22% had mild neurological deficiency, 10% had severe neurological deficiency and 17% died after their release from hospital. This protocol allowed a decrease in the ischemic complications due to the vasospasm and in the rate of rebleeding during the waiting interval when an angiographic or a clinical vasospasm allowed no surgery.

Adolescent↗
PubMed1988

[Spontaneous hepatic hematoma during pregnancy].

Spontaneous hepatic haemorrhage is a rare complication in pregnancy. It usually occurs in multiparous women who have toxaemia of pregnancy. We give a case history of a primigravid patient who was not toxemic. The hepatic haemorrhage presented as blood in the peritoneal cavity which in turn gave rise to abdominal pain with hypovolaemic shock. The surgical treatment consisted in removing the segment of the liver that had been bleeding. The physiopathology of hepatic haemorrhage as described in the literature shows that there was evidence of consumptive coagulopathy with coalescence of periportal areas of liver necrosis. Treatment therefore is that of hepatic trauma. Maternal mortality runs at 70%.

Adult↗