Effects of image background on spatial-frequency thresholds for face recognition

A great deal of work has been devoted to the question of which spatial frequencies, if any, are optimal for various visual tasks, such as face and object recognition. However, to date these studies have all been carried out with stimuli set against a uniform background. It is possible that this type of stimulus does not produce ecologically valid results. The natural world in which visual tasks normally take place involves a great deal of luminance variation and distracting visual structure, which may alter the spatial frequencies necessary for a task. We conducted two experiments that examined the effects of image background on the spatial-frequency thresholds (50% maximum of a low-pass or high-pass Butterworth filter) for face recognition by the psychophysical methods of adjustment and constant stimuli. In both experiments we found no significant difference in spatial-frequency thresholds between uniform-grey backgrounds and natural-scene backgrounds, and only minor differences between uniform-grey backgrounds and fractal noise backgrounds. This suggests that results obtained with uniform backgrounds are ecologically valid and that background effects, if they exist, are small.     

Heidegger and Practical Philosophy

Continental Philosophy Review -     

How do counsellors make client assessments?

This paper reports on a consultation exercise undertaken with 18 experienced counsellors on how they make client assessments. These practitioners expressed a high degree of consensus on the purposes of assessment making (to reach a shared understanding with the client about their willingness and ability to undertake a shared therapeutic journey) but the way in which they approached the task varied according to the theoretical orientation they acquired during training. Although most had developed their counselling skills and techniques considerably since initial training, not all had integrated the assessment implications of later experience into their formulation making. The implications of combining single model assessment with eclectic practice are discussed, particularly in relation to making a decision to continue working with a client or to refer a client to a colleague. The authors call for further debate on how counsellors find meaning in what their clients say, why they ask the questions they do at the assessment stage, and how they achieve coherence in relation to ideas and skills accrued through ongoing training and practice. The implications of such a debate for training and supervision are discussed.     

The Chinese duet: the Tao of resistance

This paper discusses the elements of a family intervention which draws on some concepts of Tao philosophy, such as polarity and returning. The polarity is that of the complimentary opposites yin and yang, and the returning is the cyclical returning and balance that is to be found in nature and its systems, which contain both a tendency towards stability and towards change. The balanced use ofjiin andjiang, when confronted by a system that is stuck off-balance, develops into a debate similar to the 'Greek Chorus'. This is then followed up by a confusing letter which leaves members of the family with a set of reframes and tasks from which they can create a response to their difficulty.     

“If a girl doesn't say ‘no’…”: young men,rape and claims of ‘insufficient knowledge’

Most psychological theories of rape tend to stress factors internal to both rapists and their victims in accounting for the phenomenon. Unlike such theories, social psychological and feminist accounts have drawn attention to social and cultural factors as productive of rape, and have criticized psychological accounts on the grounds that they often serve, paradoxically, to cement pre‐existing ‘common‐sense’. In this paper we examine the ways in which young Australian men draw upon widely culturally shared accounts, or interpretative repertoires, of rape to exculpate rapists. In particular, we discuss the reliance placed on a ‘lay’ version of Tannen's 1992 ‘miscommunication model’ of (acquaintance) rape and detail the use of this account—the claim that rape is a consequence of men's ‘not knowing’—as a device to accomplish exculpation. Implications of our methods for capturing young people's understanding of sexual coercion, rape and consent, and for the design of ‘rape prevention’ programmes, are discussed. Copyright © 2007 John Wiley & Sons, Ltd.     

The influence of 17beta-oestradiol on corticotrophin-releasing hormone induced suppression of luteinising hormone pulses and the role of CRH in hypoglycaemic stress-induced suppression of pulsatile LH secretion in the female rat

Corticotrophin-releasing hormone (CRH) released during stress has been implicated in the disruption of the reproductive neuroendocrine axis, and 17beta-oestradiol (E2) has been shown to enhance stress-induced suppression of pulsatile gonadotrophin-releasing hormone (GnRH) and luteinising hormone (LH) release. The aims of the present study were to examine the role of CRH in hypoglycaemic stress-induced suppression of LH pulses, and to investigate the influence of E2 on the inhibitory effect of CRH on pulsatile LH secretion in the female rat. Suppression of LH pulses by insulin-induced hypoglycaemic (IIH) stress was completely prevented by intracerebroventricular (icv) administration of a CRH antagonist. Central administration of CRH (5 microg) resulted in an interruption of LH pulses in E2 treated animals, but had little or no effect in the absence of this gonadal steroid. These results provide evidence of a pivotal role for CRH in mediating the suppressive effect of IIH stress on pulsatile LH secretion in the female rat, and highlight a sensitising role for E2 in CRH-induced suppression of LH pulses.     

The role of corticotrophin-releasing hormone receptors in the calcitonin gene-related peptide-induced suppression of pulsatile luteinising hormone secretion in the female rat

Corticotrophin-releasing hormone (CRH) plays a pivotal role in the suppression of the gonadotrophin-releasing hormone (GRH) pulse generator in response to stress and intracerebroventricular (i.c.v.) administration of calcitonin gene-related peptide (CGRP). We have previously shown both CRH receptor subtypes, CRH-R1 and CRH-R2, are involved in the stress-induced suppression of LH pulses. The aims of the present study were to examine the role of CRH-R1 and CRH-R2 in CGRP-induced suppression of LH pulses, and to investigate the effects of CGRP on CRH expression in the paraventricular nucleus (PVN) and central nucleus of the amygdala (CeA), which have prominent CRH neurone populations that receive dense CGRP innervations. The suppression of LH pulses by CGRP (1.5 microg i.c.v.) was completely prevented by intravenous administration of the CRH-R1 antagonist SSR125543Q (7.5 mg/rat i.v., 30 min before CGRP), but was not affected by the CRH-R2 antagonist, astressin(2)-B (100 microg i.c.v., 10 min before CGRP). CGRP increased the CRH mRNA expression in PVN and CeA. These results provide evidence of a role for CRH-R1 in mediating the suppressive effects of CGRP on pulsatile LH secretion in the female rat, and additionally raise the possibility of an involvement of PVN and CeA CRH neuronal populations in this suppression.     

The impact of the “Attachment and Biobehavioural Catch-Up” program on attachment related parent behavior—A systematic review

“Attachment and Biobehavioural Catch-Up” (ABC) is a 10 session home visiting program, grounded in attachment theory. It aims to improve child emotion regulation, attachment and behavioral outcomes through changing caregivers’ attachment related behaviors. There is increasing evidence with respect to the effectiveness of ABC in producing positive child outcomes, but the intervention's direct effect on parent outcomes remains unclear. This review examined the association of ABC with attachment related parent outcomes. The PubMed, EMBASE, PyschINFO and SCOPUS databases were searched for relevant studies in August 2021, and again in April 2022. The eligibility criteria for included studies were (1) infants aged 0–27 months at time of the ABC intervention, (2) “at risk” parents, (3) controlled trials published in peer-reviewed journals and (4) utilized a measure of attachment related parent outcomes. Eleven eligible studies were included. The findings showed ABC had a significant small to medium effect on a variety of attachment related parent outcomes among parents presenting with multiple psychosocial risk factors. “Sensitivity” was measured most frequently, with small to medium main effect sizes recorded at follow-up, compared to controls. Implications for the clinical effectiveness of the ABC program in community settings are discussed. Future research should clarify who ABC is most effective for and how it compares to similar interventions.