An optimization approach for mapping and measuring the divergence and correspondence between paths

Many domains of empirical research produce or analyze spatial paths as a measure of behavior. Previously, approaches for measuring the similarity or deviation between two paths have either required timing information or have used ad hoc or manual coding schemes. In this paper, we describe an optimization approach for robustly measuring the area-based deviation between two paths we call ALCAMP (Algorithm for finding the Least-Cost Areal Mapping between Paths). ALCAMP measures the deviation between two paths and produces a mapping between corresponding points on the two paths. The method is robust to a number of aspects in real path data, such as crossovers, self-intersections, differences in path segmentation, and partial or incomplete paths. Unlike similar algorithms that produce distance metrics between trajectories (i.e., paths that include timing information), this algorithm uses only the order of observed path segments to determine the mapping. We describe the algorithm and show its results on a number of sample problems and data sets, and demonstrate its effectiveness for assessing human memory for paths. We also describe available software code written in the R statistical computing language that implements the algorithm to enable data analysis.     

Mortality salience increases adherence to salient norms and values

Four studies indicate that mortality salience increases adherence to social norms and values, but only when cultural norms and values are salient. In Study 1, mortality salience coupled with a reminder about cultural values of egalitarianism reduced prejudice toward Blacks among non-Black participants. In Studies 2 through 4, a mortality salience induction (e.g., walking through a cemetery) increased self-reported and actual helping behavior only when the cultural value of helping was salient. These results suggest that people may adhere to norms and values so as to manage awareness of death.     

Boot night shelter

This article is an outline of the author's work as a volunteer counsellor, and describes some of the methods used and insights obtained in dealing with the special problems of counselling in non-institutionalised and unstructured settings. The general background of this type of counselling and the counselling methods used are illustrated with reference to a case study; there is also an overall evaluation of the contribution that this kind of counselling offers in contrast to more formal and institutionalised counselling methods.     

Marital disturbance and child problems: A cautionary note regarding hyperactive children

In previous work, investigators have found a relationship between marital discord and childhood conduct problems (aggression) in clinic samples. Given the wide variability of aggression found among hyperactive children,it would follow from previous work that child aggression may be associated with marital discord in a hyperactive population. This hypothesis was tested in a sample of 23 boys (ages 5 to 8) diagnosed as attention deficit with hyperactivity. Aggressive behaviors were tracked by the children's teachers for 12 school days. Parental and teacher ratings of conduct problems were also obtained. Additionally, the auditory version of the laboratory Continuous Performance Test was administered. Marital adjustment, overt hostility, and conflict tactics, as reported by the mothers, were not significantly correlated with any of the measures of aggression or conduct problems. In other words, marital discord in families with a hyperactive boy did not explain differential rates of aggressive behavior despite definite variability in both the marital and child behavioral measures. Marital discord was marginally related to severity of attentional deficit on the Continuous Performance Test. The results underscore the need for caution in attempting to extend findings from a general population (i.e., undifferentiated clinicreferred children) to a specific diagnostic subgroup (i.e., attention-deficit hyperactive children).     

Ethical and Regulatory Considerations for Using Social Media Platforms to Locate and Track Research Participants

As social media becomes increasingly popular, human subjects researchers are able to use these platforms to locate, track, and communicate with study participants, thereby increasing participant retention and the generalizability and validity of research. The use of social media; however, raises novel ethical and regulatory issues that have received limited attention in the literature and federal regulations. We review research ethics and regulations and outline the implications for maintaining participant privacy, respecting participant autonomy, and promoting researcher transparency when using social media to locate and track participants. We offer a rubric that can be used in future studies to determine ethical and regulation-consistent use of social media platforms and illustrate the rubric using our study team’s experience with Facebook. We also offer recommendations for both researchers and institutional review boards that emphasize the importance of well-described procedures for social media use as part of informed consent.     

Self-experimentation as a source of new ideas: ten examples about sleep, mood, health, and weight

Little is known about how to generate plausible new scientific ideas. So it is noteworthy that 12 years of self-experimentation led to the discovery of several surprising cause-effect relationships and suggested a new theory of weight control, an unusually high rate of new ideas. The cause-effect relationships were: (1) Seeing faces in the morning on television decreased mood in the evening (> 10 hrs later) and improved mood the next day (> 24 hrs later), yet had no detectable effect before that (0-10 hrs later). The effect was strongest if the faces were life-sized and at a conversational distance. Travel across time zones reduced the effect for a few weeks. (2) Standing 8 hours per day reduced early awakening and made sleep more restorative, even though more standing was associated with less sleep. (3) Morning light (1 hr/day) reduced early awakening and made sleep more restorative. (4) Breakfast increased early awakening. (5) Standing and morning light together eliminated colds (upper respiratory tract infections) for more than 5 years. (6) Drinking lots of water, eating low-glycemic-index foods, and eating sushi each caused a modest weight loss. (7) Drinking unflavored fructose water caused a large weight loss that has lasted more than 1 year. While losing weight, hunger was much less than usual. Unflavored sucrose water had a similar effect. The new theory of weight control, which helped discover this effect, assumes that flavors associated with calories raise the body-fat set point: The stronger the association, the greater the increase. Between meals the set point declines. Self-experimentation lasting months or years seems to be a good way to generate plausible new ideas.     

Evaluating the Acceptability of Four Versions of a Child Sexual Abuse Prevention Program

Fifty-nine college students used a modified version of the Treatment Evaluation Inventory-Short Form to evaluate the acceptability of four versions of a sexual abuse prevention program for 10-year-old children. The four versions include an information-based training approach or a behavioral skills training (BST) approach with a focus on strangers or known individuals as perpetrators of sexual abuse. A significant effect was found for both training method and type of perpetrator, with information-based approaches involving strangers as perpetrators rated the most acceptable. These results suggest that college students were most comfortable with sexual abuse prevention training programs for 10-year-olds when the programs did not involve an active rehearsal component and when the program focused on abuse perpetrated by a stranger rather than a known individual.     

Subjective Well-Being among Adolescent Consumers: The Effects of Materialism, Compulsive Buying, and Time Affluence

The burgeoning world-wide consumer culture brings with it certain baggage. Materialistic attitudes and compulsive buying have both been linked to lower levels of subjective well-being in consumers. Additionally, time is becoming an increasingly precious commodity as denizens of the consumer culture increase their work load and activities in an attempt to fully achieve the happiness promised by a lifestyle of consumption. The purpose of the present research is to investigate whether the negative impact of materialism and compulsive buying on well-being is moderated by a person’s perceived time affluence (the time one perceives he/she has available for life’s many activities). Using a large sample of adolescents (n = 1,329), the present study finds that (1) materialism and compulsive buying negatively impact subjective well-being, and that (2) time affluence moderates the relationship between materialism and compulsive buying and well-being. Specifically, perceptions of time affluence were found to negate the negative relationship between both materialism and SWB and compulsive buying and SWB. And (3), the present research appears to have uncovered a “sweet spot” when it comes to the influence of time affluence on the above relationships. Too little or too much time affluence was found to be associated with lower well-being. A simple slope analysis suggests that moderate levels of time affluence are most conducive to our well-being as consumers. In addition to discussing these findings, the authors also note certain limitations and offer directions for future research.     

Personality and Substance Use in Midlife: Conscientiousness as a Moderator and the Effects of Trait Change

Personality traits predict substance use in adolescence, but less is known about prospective substance use in middle age and beyond. Moreover, there is growing interest in how personality change and the multiplicative effects among personality traits relate to substance use. Participants included approximately 4000 adults aged 25-74 who participated in two waves of the Midlife in the US (MIDUS) study. Higher levels of neuroticism, extraversion, openness, and lower levels of conscientiousness and agreeableness predicted longitudinal substance use. Increases in neuroticism and openness predicted increased substance use while increases in conscientiousness and agreeableness predicted decreased substance use. Higher levels of conscientiousness moderated two of the other trait main effects. Personality, trait change, and interactions among traits reliably forecasted 10-year substance-use behaviors.