Persistent colonization with Tannerella forsythensis and loss of attachment in adolescents

Colonization with Tannerella forsythensis may characterize the conversion of periodontally healthy sites into diseased sites. This three-year study describes the prevalence of T forsythensis and its relationship to clinical loss of attachment (LOA) in a group of adolescents considered at risk of developing early chronic periodontitis. Adolescents with (LOA+) and without (LOA-) loss of attachment were examined at baseline and 1.5 and 3 yrs subsequently. On each occasion, attachment loss was measured on selected teeth, and the presence of T. forsythensis in their subgingival plaque samples was determined by PCR. T. forsythensis prevalence in LOA+ subjects at baseline (64%) increased to 82% and 86% on subsequent examinations. In contrast, prevalence of T. forsythensis in LOA- subjects was always significantly lower (25%, 36%, and 32%, respectively). The odds of loss of attachment were 8.16 times greater in subjects infected with T. forsythensis at each examination. These results suggest that T. forsythensis is strongly associated with loss of attachment in this adolescent population.

'You can criticize because you care': Identity attachment, constructiveness, and the intergroup sensitivity effect

Criticism of one's group (e.g. nation, gender, or organization) is typically received in a less defensive way when it stems from another ingroup member than when it stems from an outsider (the intergroup sensitivity effect). We present two experiments demonstrating that this effect is driven not by group membership per se, but by the extent to which critics are perceived to be psychologically invested in the group they are criticizing. In Experiment 1 (N = 117), Australian participants were exposed to criticisms of their country from either other Australians (ingroup critics) or non-Australians (outgroup critics). Furthermore, the ingroup critics were described as having either strong or weak attachment to their Australian identity. Ingroup critics were only received more positively than outgroup critics when they appeared to have a psychological investment in the group. In Experiment 2 (N = 96) we show how outgroup critics (Asian-Australians) can overcome defensiveness among Anglo-Australians by locating themselves within a shared, superordinate identity (Australian). Implications for communication within and between groups are discussed.

Adoption, adult attachment security, and relationship outcomes

Despite reports that adopted persons are destined for poor psychological and relational adjustment, this conclusion remains controversial. Previous research on this topic has been inconclusive, and has failed to provide a complex assessment of the predictors of adjustment. For instance, whether attachment security plays a key role in later relationship outcomes remains unresolved. This paper presents the results of a longitudinal study of adults who were adopted as infants, and a comparison sample of adults who grew up with both biological parents. Two research questions were addressed: differences in attachment security between the two samples, and the predictive relations between initial attachment scales and relationship variables (e.g., risk in intimacy, loneliness) assessed at follow-up. Attachment profiles at Time 1 indicated less security in the adopted sample than the comparison sample, and these differences were maintained at follow-up. However, adoptees who had not searched for birth relatives did not differ from the comparison sample. Although sample (adopted / comparison) was an important predictor of some relationship variables, it became less influential when attachment measures were included. Discussion focused on the complex factors that influence attachment security, and the need for in-depth study of the relational experiences of adopted people.