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50independent samples t-test will evaluate each hypothesis, respectively. Clinical and academic implications are discussed.POSTER 50NEUROBEHAVIORAL INDICES IN PARALLEL INDIVIDUATION (PI) AND APPROXIMATION NUMBER SYSTEM (ANS)JEAN EE TANG (TEACHERS COLLEGE, COLUMBIA UNIVERSITY), YUEXIN LI, PAUL J. SMITH, CHRISTOFER TOBING, JUN FU, HUIQI MENG, JENNIFER CHEN, ZEYAN ZHANG, JANIECE SPITZMUELLER, ERIN KIRBY, PETER GORDON (TEACHERS COLLEGE, COLUMBIA UNIVERSITY) This EEG study explored how the brain distinguishes small (1%u20133) versus large (4%u20136) numbers and the role of change directionality (increasing or decreasing). Eventrelated potentials (ERPs) revealed that small numbers are processed as individual objects, while large numbers rely on approximate estimation. The N1 component reflected early sensory encoding, influenced by direction, while the P3b component highlighted later cognitive processing, shaped by numerical size, suggesting distinct neural pathways for numerical perception and context updating.POSTER 51NOVEL AND WORKING MEMORY TASK VALIDITY FOR INDIVIDUALS WITH ADHDJACQUELINE HILBERT (ST. JOHN'S UNIVERSITY) ADHD is life-long neurodevelopmental disorder which impacts people's functioning in their everyday lives. For example, ADHD impacts students' ability to succeed in the classroom given individuals with ADHD are predisposed to score lower on examinations than their non-ADHD peers. The following study aimed to examine performance of ADHD individuals on novel and working memory in comparison to their non-ADHD classmates through the use of the Letter-Number Sequencing task (WAIS-IV), and a DMCC task.POSTER 52NOVEL METHODS TO ENHANCE FEAR EXTINCTION IN PEOPLE WITH SOCIAL ANXIETYMIA TZIKAS (UNIVERSITY OF CONNECTICUT), FINIAN ZAKAS (UNIVERSITY OF CONNECTICUT), SKYLER SKLENARIK (UNIVERSITY OF CONNECTICUT), SARAH FRANZEN (UNIVERSITY OF CONNECTICUT), CLAUDIA MIZEREK (UNIVERSITY OF CONNECTICUT), AISHWARYA BENZY (UNIVERSITY OF CONNECTICUT), RILEY MCNABOE (UNIVERSITY OF CONNECTICUT), HUGO POSADA-QUINTERO (UNIVERSITY OF CONNECTICUT), KIMBERLI TREADWELL (UNIVERSITY OF CONNECTICUT), DAVID TOLIN (ANXIETY DISORDER CENTER, HARTFORD HOSPITAL), ROBERT ASTUR (UNIVERSITY OF CONNECTICUT) We tested the effectiveness of adding a novel tone during extinction to reduce anxiety in 180 undergraduates. Participants were conditioned to fear an angry face, then underwent standard or augmented extinction protocols. Both groups showed similar patterns of extinction, but participants in the noveltybased extinction condition exhibited greater fear reduction to the fearful face compared to those in the standard extinction condition, which suggests that introducing a novel stimulus may enhance extinctionfor anxiety treatment.POSTER 53NOVELTY DISCRIMINATION IN PAINTED TURTLES (CHRYSEMYS PICTA)ALICE POWERS (STONY BROOK UNIVERSITY), AAYUSH NARULA (STONY BROOK UNIVERSITY), PRIYANKA MUKHERJEE (STONY BROOK UNIVERSITY), ARYAN PATEL (STONY BROOK UNIVERSITY) To study novelty discrimination in turtles, we used an X-maze containing different random objects at the end of each arm. Three phases (habituation, spatial displacement, object substitution) presented different configurations of objects on one day (8 trials separated by 1-min intertrial intervals). The animals spent more time in the arms that were changed. This is the first such demonstration in turtles and is consistent with findings in other vertebrates.POSTER 54SEX AND DOPAMINE TRANSPORTER GENOTYPE AS MODERATORS OF THE EFFECT OF EXERCISEDERICK DECAMP (VILLANOVA UNIVERSITY), BENJAMIN SACHS (VILLANOVA UNIVERSITY) We sought to examine whether sex and genetic differences in extracellular dopamine levels moderate the effect of regular exercise on behavioral outcomes in mice. Sixteen homozygous wildtype (50% female) and sixteen heterozygous dopamine transporter (DAThet; 50% female) mice from a DAT-KO line were randomly assigned to a voluntary wheel running or control condition for 21 days followed by behavioral testing. Our findings suggest that sex and DAT genotype moderates the effect of regular exercise.50