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Full-Text Articles in Cognitive Psychology
Sucrose Demand And Essential Value In Mice With Early-Life Exposure To Risperidone, Megan Federoff
Sucrose Demand And Essential Value In Mice With Early-Life Exposure To Risperidone, Megan Federoff
LSU Master's Theses
Second-generation antipsychotics (SGAs), such as risperidone, are widely prescribed to children, but the long-term effects of SGA treatment are not well understood. This study investigated the impact of early-life risperidone treatment on sucrose demand in mice in adulthood. Mice were administered risperidone or vehicle from postnatal day (PND) 33 to 60 and trained in adulthood (>PND 120) to nose poke for a sucrose solution reinforcer. The fixed ratio (FR) value (the number of responses required to produce sucrose delivery; the “price” of sucrose) was varied from 1 to 45, and the resulting consumption versus FR value data were analyzed …
Does Chronic Risperidone Administration Affect Food Reinforcement In Adulthood In Mice?, Francis Torres, Paul Soto
Does Chronic Risperidone Administration Affect Food Reinforcement In Adulthood In Mice?, Francis Torres, Paul Soto
LSU Master's Theses
Second-generation antipsychotics (SGAs) increase weight gain and food consumption in humans and non-human animals. It has been speculated that SGAs increase the reinforcing effects of food, which increases food consumption and drives weight gain. The current study evaluated the effects of risperidone on sucrose reinforcement in male and female C57BL/6J mice using economic demand assessments. Demand for sucrose was measured by varying the fixed ratio (FR) value required to produce sucrose delivery across experimental sessions using five FR values: 1, 5, 15, 30, and 45. The effects of acute risperidone administration on demand for sucrose were first assessed by orally …
Neurocognitive Interactions Between Anticipatory Anxiety And Memory Encoding, Felicia M. Chaisson
Neurocognitive Interactions Between Anticipatory Anxiety And Memory Encoding, Felicia M. Chaisson
LSU Master's Theses
Although acute anxiety has been shown to improve encoding of threat-relevant information, its effects on threat-neutral information are less understood. Recent research suggests that anxiety can impair subsequent recall for neutral words, particularly following practice with the recall task. Here we use event-related potentials (ERPs) to test the notion that anxiety specifically disrupts the implementation of encoding strategies—such as elaborative encoding—that tend to develop with practice. ERPs were recorded as participants studied two sets of neutral words, one of which was presented in a stressful context using the threat-of-shock paradigm (threat block), and the other in a non-threatening context (safe …
Previous Experiences Drive Attention, Sunghyun Kim
Previous Experiences Drive Attention, Sunghyun Kim
LSU Doctoral Dissertations
Traditionally, the allocation of attention was understood within goal-driven and stimulus-driven factors. However, the traditional approach cannot fully account for the mechanism of attentional orienting. Instead, a growing body of evidence shows that previous search experiences, irrelevant to both goal-driven and stimulus-driven factors, influence attentional allocation. For example, when contexts predict information of targets, the contexts guide attention toward the stimuli having the information predicted by the contexts: contextual cueing. In addition, more valuable stimuli attract more attention: value-driven attentional capture. However, two critical issues are present. First, contextual cueing has been found largely when the contexts and the target …