Between-subject PREE and within-subject reversed PREE in spaced-trial extinction with pigeons

Three experiments explored the partial reinforcement extinction effect (PREE; greater resistance to extinction after partial, rather than continuous, reinforcement training), in a spaced-trial situation with pigeons. Experiments 1 and 2 report conventional PREEs with 24-h intertrial intervals and between-subject designs. The corresponding outcome (food reinforcement or nonreinforcement) was delivered after satisfaction of a fixed-ratio 10 (Experiment 1) or a fixed-ratio 1 (Experiment 2). Experiment 3 reports a reversed PREE in a within-subject design with a fixed-ratio 10 requirement. Extinction occurred faster for the response paired with 50% partial reinforcement than for the response paired with continuous reinforcement. A third response paired with a small reinforcer (1 pellet/trial) in 100% of the trials extinguished faster than a response paired with a large reinforcer (15 pellets/trial). These results are discussed in the context of spaced-trial instrumental performance (key pecking and running), in pigeons.     

Amygdala oscillations and the consolidation of emotional memories

The amygdala receives multi-modal sensory inputs and projects to virtually all levels of the central nervous system. Via these widespread projections, the amygdala facilitates consolidation of emotionally arousing memories. How the amygdala promotes synaptic plasticity elsewhere in the brain remains unknown, however. Recent work indicates that amygdala neurons show theta activity during emotional arousal, and various types of oscillations during sleep. These synchronized neuronal events could promote synaptic plasticity by facilitating interactions between neocortical storage sites and temporal lobe structures involved in declarative memory.     

Speech vs. reading comprehension: an explorative study of gender representations in Norwegian

As research on the construction of a mental representation of referent gender in speech comprehension is scarce, this study examined whether factors identified in reading comprehension exert similar influence in speech comprehension. Conceptually replicating previous research, a sentence continuation evaluation task was set up in two modalities, as a listening task and as a time-confined reading task (i.e. to correspond to the time constraint when listening). In line with previous findings from self-paced reading paradigms we found gender representations in language comprehension to be grounded in the interaction between textual (grammatical) and background (stereotypical) information. Extending previous research, the effect of stereotypical information was however modulated by presentation modality. In all, although speech and reading comprehension share higher-level processes of comprehension, this study provides first evidence that differences in comprehension might occur due to differences such as orthographic access or attention allocation.     

Processing Differences between Feature‐Based Facial Composites and Photos of Real Faces

Computer‐generated faces (composites) constructed by select2ing individual facial features (e.g. eyes, nose, mouth) are poorly recognized because this process contrasts with the natural holistic processing of real faces. This result suggests that there should be differences in the cognitive processing of these composites compared with photos of real faces, which would make these stimuli problematic for theories seeking to explain real face processing. We conducted five experiments to test potential conditions for moving composite processing closer to how real face photos are processed, first taking the perspective of researchers who construct composites with a random selection of available features and then taking a perspective closer to police by creating each composite to match a real face photo. Composites with randomly selected features (but configured like real faces) showed no face inversion effect and recognition memory for these composites benefited from increased encoding time, unlike real face photos. Although composites constructed to match real face photos yielded an inversion effect, they still were remembered differently than the photos. Researchers should not use feature‐based composites as proxies for real face photos. We conclude with a discussion of alternative methods of constructing composites. Copyright © 2012 John Wiley & Sons, Ltd.     

The control of posture in newly standing infants is task dependent

The postural sway patterns of newly standing infants were compared under two conditions: standing while holding a toy and standing while not holding a toy. Infants exhibited a lower magnitude of postural sway and more complex sway patterns when holding the toy. These changes suggest that infants adapt postural sway in a manner that facilitates visually fixating on and stabilizing the toy in their hand. When simply standing, infants exhibited postural sway patterns that appeared to be more exploratory in nature. Exploratory sway patterns may allow infants to learn the affordances of their new standing posture. These results demonstrate that newly standing infants are capable of task-dependent postural control.     

The Effectiveness of an Explicit Instruction Writing Program for Second Graders

The National Assessment of Educational Progress found that only 25% of 4th, 8th, and 12th grade students were at grade-level writing proficiency (Greenwald et al. 1999). Insufficient writing skill is a major contributor to lack of school and college success. The current study evaluated a modification of Quickwrite (Maloney 1998), a strategic writing program that explicitly teaches students how to brainstorm, plan, draft, and revise within brief time periods. Teachers who did not have knowledge of the study or the participants rated the overall number of story elements included in second-grade students’ stories higher after the intervention. The rate of student writing did not improve. Results were maintained 4 weeks after the intervention.     

Utilization of Hospital-Based Chaplain Services Among Newly Diagnosed Male Veterans Affairs Colorectal Cancer Patients

The aim of the study was to examine utilization of chaplain services among Veterans Affairs patients with colorectal cancer (CRC). In 2009, the Cancer Care Assessment and Responsive Evaluation Studies questionnaire was mailed to VA CRC patients diagnosed in 2008 (67 % response rate). Multivariable logistic regression examined factors associated with chaplain utilization. Of 918 male respondents, 36 % reported utilizing chaplains. Chaplain services were more likely to be utilized by patients with higher pain levels (OR = 1.017; 95 % CI = 0.999–1.035), younger age (age OR = 0.979; 95 % CI = 0.964–0.996), and later cancer stage (early stage OR = 0.743; 95 % CI = 0.559–0.985). Chaplain services are most utilized by younger, sicker patients.     

Preventing Maltreatment with a Community-Based Implementation of Parent–Child Interaction Therapy

The purpose of this study was to examine rates of child abuse and neglect reports following a community implementation of Parent–Child Interaction Therapy (PCIT), an evidence-supported intervention for the prevention of maltreatment. Among a group of families receiving PCIT, predictors of reports were examined including family demographics, course of treatment, changes in clinical measures, and caregiver report for prior maltreatment victimization and perpetration. Participants (n = 120) included families at-risk for future maltreatment with and without prior maltreatment history. Agency case records were linked with state administrative records of child welfare reports. Time to follow-up ranged from 13 to 40 months. Bivariate and multivariate survival analyses were used to model risk for a later report. During the follow-up period, 12.5 % of families had a report for physical abuse or neglect. Reports of prior victimization as a child and prior perpetration as an adult were strong predictors of a report of perpetration after PCIT. Dosage of PCIT and change in clinical measures did not increase risk for a later report. PCIT can be an effective intervention for preventing maltreatment. Family history of child welfare involvement is a prominent factor in assessing risk for future involvement.