Participant Retention in the Parents Matter! Program: Strategies and Outcome

We present a discussion of the literature addressing retention of ethnic minority samples in longitudinal studies. In addition, we describe the retention procedures implemented in the Parents Matter! Program (PMP), a community-based sexual risk reduction intervention for African American families. Finally, the results of PMP's retention strategies are presented.     

Resistance to Pragmatic Tendencies in the World of Working in the Religious Finite Province of Meaning

This essay describes some of the basic pragmatic tendencies at work in the world of working and then shows how the finite provinces of meaning of theoretical contemplation and literature act against those pragmatic tendencies. This analysis prepares the way to see how the religious province of meaning in a similar but also distinctive way acts back against these pragmatic tendencies. These three finite provinces of meaning make it possible to see the world from another center of orientation than that of the ego agens and its proclivity to bring transcendences within reach, thereby freeing oneself to a degree from the fundamental anxiety and revealing the uniqueness of oneself and others, who are no longer subjected to working’s pragmatic imperatives.     

The Hebb repetition effect as a laboratory analogue of novel word learning

The present study tests the hypothesis that a common ordering mechanism underlies both short-term serial recall of verbal materials and the acquisition of novel long-term lexical representations, using the Hebb repetition effect. In the first experiment, participants recalled visually presented nonsense syllables following a typical Hebb effect learning protocol. Replicating the Hebb repetition effect, we observed improved recall for repeated sequences of syllables. In the second experiment, the same participants performed an auditory lexical decision task, which included nonwords that were constructed from the syllables used in the first experiment. We observed inhibited rejection of nonwords that were composed of the repeated Hebb sequences, compared to nonwords that were built from nonrepeated filler sequences. This suggests that a long-term phonological lexical representation developed during Hebb learning. Accordingly, the relation between immediate serial recall and word learning is made explicit by arguing that the Hebb repetition effect is a laboratory analogue of naturalistic vocabulary acquisition.     

The Nootropic Properties of Ginseng Saponin Rb1 are Linked to Effects on Anxiety

Previous studies have shown that crude ginseng extracts enhance performance on shock-motivated tasks. Whether such performance enhancements are due to memory-enhancing (nootropic) properties of ginseng, or to other non-specific effects such as an influence on anxiety has not been determined. In the present study, we evaluated both the nootropic and anxiolytic effects of the ginseng saponin Rb1. In the first experiment, 80 five-day-old male chicks received intraperitoneal injections of 0, 0.25, 2.5 or 5.0 mg/kg Rb1. Performance on a visual discrimination task was evaluated 15 minutes, 24 and 72 hours later. Acquisition of a visual discrimination task was unaffected by drug treatment, but the number of errors was significantly reduced in the 0.25 mg/kg group during retention trials completed 24 and 72 hours after injection. Animals receiving higher dosages showed trends towards enhancement initially, but demonstrated impaired performance when tested 72 hours later. Rb1 had no effect on response rates or body weight. In the second experiment, 64 five-day-old male chicks received similar injections of Rb1 (0, 0.25, 2.5 or 5.0 mg/kg) and separation distress was evaluated 15 minutes, 24 and 72 hours later. Rb1 produced a change in separation distress that depended on the dose and environmental condition under which distress was recorded. These data suggest that Rb1 can improve memory for a visual discrimination task and that the nootropic effect may be related to changes in anxiety.     

Gender perspective in the context of Spanish academic psychology

The purpose of this study is to analyse the evolution of gender perspective in the context of the Spanish academic Psychology. The last three decades were analysed. In each decade, the study describes the groups and individuals who have contributed to the analysis of gender perspective in Psychology, the sponsoring institutions, and the most frequently used research strategies. Likewise, the study analyses the development of topics and areas in these three decades. The general trend shows that the interpretation of sex/gender has moved away from being considered an individual and internal factor to a more dynamic approach that analyses sex/gender through behavioural practices.     

A component analysis of behavioral skills training with volunteers teaching motor skills to individuals with developmental disabilities

This study included a component analysis of behavioral skills training (BST) for teaching volunteers how to use this training method to support individuals with developmental disabilities in a physical education program. In an alternating treatment design embedded within a multiple baseline design across five participants, the number of BST steps that volunteers completed correctly while teaching four motor skills was measured. In the initial training phase, each motor skill was taught to volunteers using a specific component of BST (i.e., instructions, modeling, rehearsal, or feedback). In subsequent training phases, BST components were combined to teach the volunteers the motor skills for which they did not reach a predetermined mastery criterion (a score of four correct responses across two consecutive trials). Maintenance was assessed. Results indicated that individual components of BST alone were sufficient for volunteers to meet the mastery criterion; however, the full BST framework was necessary for skill maintenance. Strengths, limitations, and recommendations for future research are discussed.     

Fact learning: how information accuracy, delay, and repeated testing change retention and retrieval experience

Previous classroom studies have shown that the phenomenology of studied facts changes over time. However, pedagogical needs preclude both the study of errors and the separation of the effects that delay and repeated testing have on retention and retrieval experience. We addressed these issues together in an experiment where participants read stories containing correct and misleading information and provided Remember, Just Know, and Familiar judgements on immediate and delayed general knowledge tests. After 2 days, information learned from the stories shifted from Remembered to Just Known, but repeated testing attenuated this shift. Interestingly, similar patterns of retrieval and phenomenology were observed for correct and misleading information with one important difference--the shift over time to Just Knowing was significantly greater for correct than for misleading information. Together, these findings show the roles of information accuracy, delay, and testing in determining both retention and the subjective experience of retrieval.     

Learning and memory deficits in mice lacking protease activated receptor-1

The roles of serine proteases and protease activated receptors have been extensively studied in coagulation, wound healing, inflammation, and neurodegeneration. More recently, serine proteases have been suggested to influence synaptic plasticity. In this context, we examined the role of protease activated receptor 1 (PAR1), which is activated following proteolytic cleavage by thrombin and plasmin, in emotionally motivated learning. We were particularly interested in PAR1 because its activation enhances the function of NMDA receptors, which are required for some forms of synaptic plasticity. We examined several baseline behavioral measures, including locomotor activity, expression of anxiety-like behavior, motor task acquisition, nociceptive responses, and startle responses in C57Bl/6 mice in which the PAR1 receptor has been genetically deleted. In addition, we evaluated learning and memory in these mice using two memory tasks, passive avoidance and cued fear-conditioning. Whereas locomotion, pain response, startle, and measures of baseline anxiety were largely unaffected by PAR1 removal, PAR1-/- animals showed significant deficits in a passive avoidance task and in cued fear conditioning. These data suggest that PAR1 may play an important role in emotionally motivated learning.     

Amnesia induced by 2-deoxygalactose in the day-old chick: lateralization of effects in two different one-trial learning tasks

2-Deoxy-D-galactose, an inhibitor of brain glycoprotein fucosylation, was injected intracranially (10 mumole dose in 10 microliters) into either the left or the right forebrain hemisphere of day-old chicks (Gallus domesticus). Bilateral injection of this dose of 2-deoxy-D-galactose is known to induce amnesia for several learning tasks including one-trial passive avoidance and sickness-induced learning. When a tritiated form of the drug was injected into one forebrain hemisphere only, a significantly large proportion of the dose remained in that hemisphere. Chicks were trained in two different one-trial learning tasks. The first was a passive avoidance task in which the chicks were allowed to peck at a green training stimulus (a small light-emitting diode, LED) coated in the bitter liquid, methylanthranilate, giving rise to a strong disgust response and consequent avoidance of the green stimulus. In the second paradigm the chicks were allowed to peck at a similarly colored dry stimulus but, 30 min later, were injected intraperitoneally with lithium chloride (0.1 ml of 1 M solution), causing a sickness-induced aversion for the green LED. 2-Deoxy-D-galactose caused amnesia for the passive avoidance task when injected before training into the right hemisphere but not the left. However, unilateral injection of the drug before training on the sickness-induced learning task did not cause amnesia. The results indicate that fucosylation of brain glycoproteins is required in the right hemisphere for learning the passive avoidance task but that memory for sickness-induced learning can be retained by either hemisphere.