A Novel Lumbar Motion Segment Classification to Predict Changes in Segmental Sagittal Alignment After Lateral Interbody Fixation.

Study designRetrospective cohort study.ObjectivesLateral interbody fixation is being increasingly used for the correction of segmental sagittal parameters. One factor that affects postoperative correction is the resistance afforded by posterior hypertrophic facet joints in the degenerative lumbar spine. In this article, we describe a novel preoperative motion segment classification system to predict postoperative correction of segmental sagittal alignment after lateral lumbar interbody fusion.MethodsPreoperative computed tomography scans were analyzed for segmental facet osseous anatomy for all patients undergoing lateral lumbar interbody fusion at 3 institutions. Each facet was assigned a facet grade (min = 0, max = 2), and the sum of the bilateral facet grades was the final motion segment grade (MSG; min = 0, max = 4). Preoperative and postoperative segmental lordosis was measured on standing lateral radiographs. Postoperative segmental lordosis was also conveyed as a percentage of the implanted graft lordosis (%GL). Simple linear regression was conducted to predict the postoperative segmental %GL according to MSG.ResultsA total of 36 patients with 59 operated levels were identified. There were 19 levels with MSG 0, 14 levels with MSG 1, 13 levels with MSG 2, 8 levels with MSG 3, and 5 levels with MSG 4. Mean %GL was 115%, 90%, 77%, 43%, and 5% for MSG 0 to 4, respectively. MSG significantly predicted postoperative %GL (P < .01). Each increase in MSG was associated with a 28% decrease in %GL.ConclusionsWe propose a novel facet-based motion segment classification system that significantly predicted postoperative segmental lordosis after lateral lumbar interbody fusion

Helpful or Harmful? The Role of Ingroup Members as the Source of Evaluation in Stereotype Threat Contexts

Negative stereotypes are harmful not only because they can instigate prejudice and discrimination from others; they also have the power to arouse damaging fears and concerns in the minds of negatively stereotyped individuals – a phenomenon known as stereotype threat. Being worried about confirming and reinforcing negative stereotypes that could potentially apply to oneself is distracting and has far-reaching negative consequences on an individual’s cognitions, attitudes, and behaviors. Given the potential for stereotypes to have such a significant negative impact, what approaches might offer protection from the harmful effects of stereotype threat? A significant amount of stereotype threat intervention research has pointed to highlighting the presence of ingroup members – or members of an important social group that one belongs to – who have the potential to both encourage and inspire improvements in performance when faced with negative stereotypes. However, very little work has investigated the conditions under which ingroup members might serve as a source of threat in contexts when negative stereotypes are salient. It is plausible that ingroup members should, under some circumstances, evoke threat when they are in a position to judge one’s actions, resulting in negative outcomes typically associated with stereotype threat effects. Three experiments investigate the role of ingroup members as a source of evaluation in stereotype threat contexts, pinning down specifically when ingroup members are more likely to serve a helpful, protective role versus a more harmful role on individuals experiencing stereotype threat. In Experiments 1 and 2, ingroup member evaluators – whether portrayed as successful role models (Experiment 1) or merely present ingroup peers (Experiment 2) – serve as a source of support and can protect performance when one’s personal abilities are the target of evaluation, but serve as a source of threat and result in destructive performance decrements when the group’s reputation is at stake (group-as-target stereotype threat contexts). Using an online vignette study design, Experiment 3 demonstrates that the threat elicited by ingroup member sources of evaluation in group-as-target stereotype threat contexts is qualitatively different from the threat elicited by outgroup member sources of evaluation, and is characterized by concerns about disappointing the ingroup member evaluator

Adding Fuel to the Collective Fire: Stereotype Threat, Solidarity, and Support for Change

We hypothesize a yet-unstudied effect of experiencing systemic stereotype threat on women’s collective action efforts: igniting women’s support for other women and motivation to improve organizational gender balance. Hypotheses are supported in two surveys (Study 1: N=1,365 business school alumnae; Study 2: N=386 women MBAs), and four experiments (Studies 3-6; total N = 1,897 working women). Studies 1 and 2 demonstrate that experiencing stereotype threat is negatively associated with women’s domain-relevant engagement (supporting extant work on the negative effects of stereotype threat), but positively associated with women’s support and advocacy of gender balance. Studies 3-6 provide causal evidence that stereotype threat activation leads to greater attitudes and intentions to support gender balance, ruling out negative affect as an alternative explanation and identifying ingroup solidarity as a mechanism. We discuss implications for working women, women leaders, and organizations striving to empower their entire workforce through developing equitable and inclusive practices

Solidarity through shared disadvantage: Highlighting shared experiences of discrimination improves relations between stigmatized groups.

Intergroup relations research has largely focused on relations between members of dominant groups and members of disadvantaged groups. The small body of work examining intraminority intergroup relations, or relations between members of different disadvantaged groups, reveals that salient experiences of ingroup discrimination promote positive relations between groups that share a dimension of identity (e.g., 2 different racial minority groups) and negative relations between groups that do not share a dimension of identity (e.g., a racial minority group and a sexual minority group). In the present work, we propose that shared experiences of discrimination between groups that do not share an identity dimension can be used as a lever to facilitate positive intraminority intergroup relations. Five experiments examining relations among 4 different disadvantaged groups supported this hypothesis. Both blatant (Experiments 1 and 3) and subtle (Experiments 2, 3, and 4) connections to shared experiences of discrimination, or inducing a similarity-seeking mindset in the context of discrimination faced by one's ingroup (Experiment 5), increased support for policies benefiting the outgroup (Experiments 1, 2, and 4) and reduced intergroup bias (Experiments 3, 4, and 5). Taken together, these experiments provide converging evidence that highlighting shared experiences of discrimination can improve intergroup outcomes between stigmatized groups across dimensions of social identity. Implications of these findings for intraminority intergroup relations are discussed. (PsycINFO Database Recor

A Novel Lumbar Motion Segment Classification to Predict Changes in Segmental Sagittal Alignment After Lateral Interbody Fixation.

Study designRetrospective cohort study.ObjectivesLateral interbody fixation is being increasingly used for the correction of segmental sagittal parameters. One factor that affects postoperative correction is the resistance afforded by posterior hypertrophic facet joints in the degenerative lumbar spine. In this article, we describe a novel preoperative motion segment classification system to predict postoperative correction of segmental sagittal alignment after lateral lumbar interbody fusion.MethodsPreoperative computed tomography scans were analyzed for segmental facet osseous anatomy for all patients undergoing lateral lumbar interbody fusion at 3 institutions. Each facet was assigned a facet grade (min = 0, max = 2), and the sum of the bilateral facet grades was the final motion segment grade (MSG; min = 0, max = 4). Preoperative and postoperative segmental lordosis was measured on standing lateral radiographs. Postoperative segmental lordosis was also conveyed as a percentage of the implanted graft lordosis (%GL). Simple linear regression was conducted to predict the postoperative segmental %GL according to MSG.ResultsA total of 36 patients with 59 operated levels were identified. There were 19 levels with MSG 0, 14 levels with MSG 1, 13 levels with MSG 2, 8 levels with MSG 3, and 5 levels with MSG 4. Mean %GL was 115%, 90%, 77%, 43%, and 5% for MSG 0 to 4, respectively. MSG significantly predicted postoperative %GL (P < .01). Each increase in MSG was associated with a 28% decrease in %GL.ConclusionsWe propose a novel facet-based motion segment classification system that significantly predicted postoperative segmental lordosis after lateral lumbar interbody fusion