Evaluating Stimulus-Stimulus Pairing and Direct Reinforcement in the Establishment of an Echoic Repertoire of Children Diagnosed with Autism

Many children with autism do not imitate adult vocalizations, an important skill in learning to talk. Pairing adult vocalizations with preferred stimuli has been shown to increase free-operant vocalizations but effects are temporary; thus, direct reinforcement may be necessary to establish durable vocal behaviors. In Experiment 1, directly reinforced echoic responses did not increase following stimulus-stimulus pairings in three children with autism. Similarly, pairings did not increase free-operant vocalizations in Experiment 2, a replication of Miguel et al. (2002). Experiment 3 demonstrated that shaping increased vowel frequency for one participant. Results suggest that variables are yet to be delineated that influence effectiveness of a stimulus-stimulus pairing procedure on vocalization frequency and acquisition of a verbal operant following such pairings.     

Concordance of Carcinogenic Response between Rodent Species: Potency Dependence and Potential Underestimation

The use of average qualitative concordance between two bioassay endpoints is considered, with emphasis directed at agreement between rats and mice from results of long-term carcinogenicity studies. It is noted that concordance varies as a function of the underlying potency or toxicity of the chemicals over which the averaging is performed. Thus, the averaging process dilutes large observed concordances from potent chemicals, and possibly inflates lower observed concordances from weakly active chemicals. Stratification over some measure of potency is suggested as a method for taking these effects into account. Statistical simulations of concordance analyses limited to low-potency ranges are employed to examine the concordance measure in greater detail. It is seen that at low potencies, observed concordance is consistently underestimated, reaching maximum levels of only about 80%.     

Health care proxies: whom do young old adults choose and why?

Dying persons are encouraged to name as durable power of attorney for health care (DPAHC) someone who will thus be empowered to make end-of-life treatment decisions for them in the event that they become incapacitated. We use data from the Wisconsin Longitudinal Study to investigate whether and whom older adults designate as their DPAHC. DPAHC appointments are affected by recent hospitalizations, personal beliefs (including religion, fear of death, and the belief that doctors rather than patients should control health care decisions), and personal experience with the recent painful death of a loved one. The selections of DPAHC designees are generally consistent with the hierarchical compensatory model: Married persons overwhelmingly name their spouses, while unmarried parents appoint their children. Women are more likely than men to rely on children. Parents of one or two children tend to bypass their children for another relative. Unmarried, childless persons show considerable heterogeneity in their choices. We discuss implications of these findings for health care policy and practice.     

Ten Research Questions for Family Therapy

A growing evidence‐base shows that family therapy works, but many gaps in our knowledge remain about the conditions under which family therapy is effective and how it works. In this paper, ten critical research questions about family therapy that need to be addressed are considered. In short these are:

• 1 Is family therapy as effective in community settings as it is in specialist clinics?
• 2 For what problems is family therapy cost‐effective?
• 3 Does family therapy work for under‐researched problems and populations?
• 4 Do social‐constructionist and narrative approaches to family therapy work?
• 5 Can family therapy protocols be enhanced for non‐responders?
• 6 Can family therapy be combined with other psychotherapies to effectively treat specific problems?
• 7 Can family therapy be combined with pharmacotherapy to effectively treat specific problems?
• 8 What specific factors contribute to the effectiveness of family therapy with particular problems?
• 9 What common factors contribute to the effectiveness of family therapy?
• 10 What therapist and client factors contribute to the effectiveness of family therapy?

     

End‐of‐Life Treatment Preferences Among Older Adults: An Assessment of Psychosocial Influences1

We explore the content and correlates of older adults’ end‐of‐life treatment preferences in two hypothetical terminal illness scenarios: severe physical pain with no cognitive impairment, and severe cognitive impairment with no physical pain. For each scenario, we assess whether participants would reject life‐prolonging treatment, accept treatment, or do not know their preferences. Using data from the 2004 wave of the Wisconsin Longitudinal Study (N = 5,106), we estimate multinomial logistic regression models to evaluate whether treatment preferences are associated with direct experience with end‐of‐life issues, personal beliefs, health, and sociodemographic characteristics. Persons who have made formal end‐of‐life preparations, persons with no religious affiliation, mainline Protestants, and persons who are pessimistic about their own life expectancy are more likely to reject treatment in both scenarios. Women and persons who witnessed the painful death of a loved one are more likely to reject treatment in the cognitive impairment scenario only. Consistent with rational choice perspectives, our results suggest that individuals prefer treatments that they perceive to have highly probable desirable consequences for both self and family.     

Do Spousal Discrepancies in Marital Quality Assessments Affect Psychological Adjustment to Widowhood?

We use prospective couple‐level data from the Changing Lives of Older Couples to assess the extent to which spouses concur in their assessments of marital quality (N = 844) and whether discrepancies in spouses' marital assessments affect the bereaved spouse's psychological adjustment 6 months after loss (n = 105). Spouses' assessments of marital quality are correlated modestly (r = .45), with women offering less positive assessments. Bereaved persons who had rated their marriages more positively than their spouse at the preloss interview reported higher levels of anger 6 months postloss. We conclude that persons who offer more positive appraisals of their marriages than their spouse may view spousal loss as a particularly unjust event. We discuss implications for understanding late life marriage and spousal bereavement.     

The population,agriculture, and environment nexus in Latin America: country-level evidence from the latter half of the twentieth century

Unprecedented population growth and migration accompanied equally unprecedented land use and land cover change in Latin America during the latter decades of the twentieth century. Country-level data are examined with bivariate statistics to determine relationships between changes in population patterns and land use (agriculture and forest cover) from 1961 to 2001. In South America, large forest areas were eliminated during the period, while exceptionally high rates of forest clearing were ubiquitous in the Central America/Caribbean region. These environmental changes accompanied dissimilar initial population densities and different effects of population change on agriculture. While interacting with a host of political, socio-economic, and geographic processes, it appears that both Malthusian and Boserupian demographic processes were important drivers of deforestation. Given continued, though slowing, population growth, increased urban consumption, and future land use constraints, policy makers face myriad challenges in advancing sustainable agriculture-population dynamics in Latin America.     

Predictors of Readiness for Mobility Transition in Older Drivers

We administered the Assessment of Readiness for Mobility Transition (ARMT) to 301 older drivers and compared total scores with participant characteristics. Overall, 18% of participants were not attitudinally ready for mobility transition, while 19% were very ready. Notably, participants with hospitalizations in the past year were either very ready for mobility transition (20% vs 14% without hospitalizations) or not ready at all (30% vs 17%). Significant health events may polarize reactions towards mobility transition. Individualizing communication about driving cessation readiness could help address such differing views. To further consider its effectiveness, ARMT could be utilized in mobility transition counseling interventions.