Department of Psychology
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- ItemCognitive Event-Related Potentials in Young Adults With Cerebral Palsy: A Proof-of-Concept Study(Sage, 2024) Lackner, Christine L.; Gorter, Jan Willem; Segalowitz, Sidney J.; MyStory Study GroupCerebral palsy (CP) is a movement and posture disorder often accompanied by cognitive difficulties which can be assessed using event-related potentials (ERPs), an often-overlooked tool in this population. Here we describe our assessment protocol, examine its feasibility, and validate the use of single-subject ERP analyses in adolescents and young adults with CP, an analysis approach which recognizes the heterogeneity of the clinical population. This study involved a final sample of 9 adolescents/young adults with CP participating in the “MyStory” study (age range 16-29 years, Mage = 25.0 years; 6 female; Gross Motor Function Classification System level I [n = 4], II [n = 2], III [n = 1], IV [n = 1], and V [n = 1]). ERP components were elicited over medial prefrontal and central cortex (error- and correct-related negativities [ERN/CRN], error-positivity [Pe], N100, P200, N200, P300), as well as those generated over occipital cortex (P100, N170). Group and single-subject ERP statistics were computed for ERPs recorded over both areas. Using recently developed data analysis methods (independent components analysis and robust bootstrapped single-subject statistics), we measured the number of participants demonstrating significant condition differences at the timing of each ERP component of interest. We demonstrate good validity for ERPs recorded during 2 of our 3 tasks eliciting frontal activation (eg, 4 of 6 participants with usable data showed a significant single-subject medial frontal negativity condition difference in a context-switching task) and good validity for ERPs derived from a task engaging occipital regions (eg, 8 of 9 participants each showed a significant N170 face-object condition effect).
- ItemDemographic, psychological, and experiential correlates of SARS-CoV-2 vaccination intentions in a sample of Canadian families(Elsevier, 2021) Lackner, Christine L.; Wang, Charles H.The COVID-19 pandemic has been ongoing for close to a year, with second waves occurring presently and many viewing vaccine uptake as the most likely way to curb successive waves and promote herd immunity. Reaching herd immunity status likely necessitates that children, as well as their parents, receive a vaccine targeting SARS-CoV-2. In this exploratory study, we investigated the demographic, experiential, and psychological factors associated with the anticipated likelihood and speed of having children receive a SARS-CoV-2 vaccine in a sample of 455 Canadian families (858 children; parents’ mean age = 38.2 ± 6.82 years). Using linear mixed-effects and proportional odds logistic regression models, we demonstrated that older parental age, living in the Prairies (relative to Central Canada), more complete child vaccination history, and a greater tendency to prioritise the risks of the disease relative to the risks of side effects (i.e. lower omission bias) were associated with higher likelihoods of intention to vaccinate participants’ children, with trend-level associations with lower perceived danger of the vaccine and higher psychological avoidance of the pandemic. Faster speed of intended vaccination was predicted by a similar constellation of variables with an additional predictor of a child in the family having a COVID-19 related health risk being associated with slower intended speed. Results are discussed concerning public health knowledge mobilisation and the unique Canadian health landscape.
- ItemDoes Anxiety Enhance or Hinder Attentional and Impulse Control in Youth With ADHD? An ERP Analysis(Sage, 2017) Klymkiw, Deanna F.; Milligan, Karen; Lackner, Christine; Phillips, Marjory; Schmidt, Louis A.; Segalowitz, Sidney J.Objective: Youth with ADHD and comorbid anxiety (ADHD+ANX) experience increased social and academic impairment compared with youth with ADHD without anxiety (ADHD). Group differences in attentional and impulse control may underlie this increased impairment. Examination of group differences using behavioral measures of attentional and impulse control has yielded inconsistent findings. This study explored group differences using event-related potentials (ERPs), which provide neural information concerning early information processing. Method: ERPs (early frontal positivity [EFP], N2) were collected while youth aged 11 to 17 with ADHD (n = 31) and ADHD+ANX (n = 35) completed a visual and an auditory computer task. Results: Compared with the ADHD group, the ADHD+ANX group exhibited larger N2 amplitudes to no-go stimuli and larger EFP amplitudes to target auditory stimuli, with variable attention allocation to nontarget stimuli. Conclusion: The addition of anxiety to ADHD appears to alter early attentional processing, which may be an important aspect of this comorbidity.
- ItemAn Evaluation of the Paths Curriculum in the Context of Theories of Social-Emotional Development(Mount Saint Vincent University, 2019-10) Foley, BláthnaidExperiencing trauma, particularly within the primary caregiving environment can have a negative effect on the development of social-emotional skills, particularly self-regulation in children. School success is dependent upon social-emotional skills making it important for schools to have programs that teach social-emotional skills. PATHS is a social-emotional learning program widely used in schools in Nova Scotia. The study examined whether PATHS is a good curriculum to use in schools with children who have experienced trauma using a framework based on research about social-emotional learning and the developmental needs of traumatized children identified by the Attachment Regulation Competency (ARC) model. In general, the PATHS curriculum introduces social-emotional skills in a manner that could be beneficial for all students, but additional supports would likely be needed to address the individual areas of competency and difficulty and build the necessary skills of children who have experienced trauma. Recommendations are about implementing PATHS in a real school environment.
- ItemEvidence Based Best Practices in the Teaching of Written Expression: Implications for the Atlantic Provinces Educational Outcomes(Mount Saint Vincent University, 2013) Roberts, Crystal D.This thesis examined evidence-based best practices in the teaching of written expression in two phases. The first phase, linked evidence-based research on writing instruction directly to Atlantic Canada Curriculum outcomes (Grades 4-6) in writing. In the second phase, the Teaching in Action document (Nova Scotia Department of Education, 2007) was analyzed to determine the nature of evidence for the components of effective instruction as explained by the Learning Oriented Teaching (LOT) model (Cate, Snell, Mann, & Vermunt, 2004). Effective components in instruction include the development of basic writing skills, metacognitive skills, motivation and the gradual release of responsibility from teacher to student. This thesis can benefit Nova Scotia teachers as it can serve as a clear and simple reference that links empirically supported teaching practices to curriculum outcomes. It also provides recommendations to enrich outcomes within the English language arts curriculum.
- ItemInfantile Features, Human Preferences, and the Evolution of the Teddy Bear(2009-11-21T23:54:19Z) Manzer, Linda; Harrington, Fred
- ItemLinking recommendations from psycho-educational reports to curriculum outcomes for the Atlantic Provinces: Examining evidence-based practices in reading instruction.(Mount Saint Vincent University, 2008-08) Kara K., MacLeod-MacDougallThis thesis examined evidence-based practices in instruction for students struggling to acquire reading skills. These practices were then used to formulate recommendations which relate to the Atlantic Canada English language arts curriculum outcomes. The two main purposes for this thesis were to better inform school psychologists and teachers about evidence-based practices in reading instruction for students who struggle with reading; and to relate psycho-educational recommendations to the curriculum outcomes provided in the Atlantic Canada English Language Arts Curriculum, both in the Elementary K-3 (e.g., New Brunswick Department of Education Curriculum Development Branch, 1998) and Grades 4-6 (e.g., Nova Scotia Department of Education and Culture, 1998) documents.
- ItemMental Time Travel: Is Experience Everything?(2013-04-08) Talisman, EmadAccording to research on mental time travel, differences between episodic memory and episodic future thought are due to temporal direction (i.e., past vs. future). Recently, it has been suggested that it is familiarity with memories and associated details that may affect such differences. Following the recombination methodology of Addis, Pan, Vu, Laiser, and Schacter (2009), participants (N = 27) were asked to recall episodic memories, and to imagine episodic events in the past, present, or future using memory details ranked for level of familiarity collected prior to the experiment. Data on both self-‐report (e.g., vividness, effortfulness) and objective (e.g., level of detail, coherence) characteristics of the remembered and imagined events were collected. It was predicted that familiarity with memories and associated details, not temporal direction, would account for the differences between episodic memory and future thought. Results did not support this hypothesis, but demonstrated that the variation between episodic memory and episodic future thought is due to the relationship between remembering and imagination. Suggestions are made to (a) change conceptualization of episodic future thought such that the focus is on the process of imagining and not on mental projection into the future, and (b) replicate the current design with a false memory condition to validate and expand upon the findings.
- ItemPerinatal nicotine exposure relates to stimulus-locked event-related potentials in early adolescence during an emotional go/no-go task(Elsevier, 2023) Lackner, Christine L.; Thompson, Bailey; Santesso, Diane L.; Wade, Terrance J.; Segalowitz, Sidney J.Nicotine exposure is associated with negative consequences on the developing brain, both in utero and after birth. We investigated the relationship between perinatal nicotine exposure and electroencephalographic brain activity recorded during an emotional faces Go/No-Go task among adolescents. Seventy-one adolescents aged 12–15 years completed a Go/No-Go task using fearful and happy faces. Parents completed questionnaire measures of their child's temperament and self-regulation and retrospectively reported on nicotine exposure during the perinatal period. Perinatally exposed children (n = 20) showed increased and prolonged frontal event-related potential (ERP) differentiation in stimulus-locked analyses; that is, greater emotion and condition differentiation in comparison with their non-exposed peers (n = 51). However, non-exposed children showed greater late emotion differentiation recorded over posterior sites. Response-locked ERP differences were not found. ERP effects were not related to temperamental, self-regulatory, or parental education and income-related factors. This study is the first to demonstrate a relationship between perinatal nicotine exposure and ERPs in an emotional Go/No-Go task among adolescents. Findings suggest that while conflict detection remains intact for adolescents with perinatal nicotine exposure, their attentional allocation to behaviourally relevant stimuli may be magnified to beyond optimal levels, particularly when emotion is salient in information processing. Future studies can extend these findings by isolating prenatal nicotine exposure and comparing its effects to isolated postnatal exposure and clarifying the implications of the face and performance processing differences in adolescence.
- ItemPredictors of Intention to Vaccinate or Continue to Vaccinate Children Against SARS-CoV-2 During the Fifth Wave of the COVID-19 Pandemic in the USA(Sage, 2023) Lackner, Christine L.; Wang, Charles H.The Centre for Disease Control recommends vaccination of children against SARS-CoV-2 to reduce the severity of COVID-19 disease and reduce the likelihood of associated complications. Vaccination of children requires the consent of parents or guardians, and levels of consent may ebb and flow over the course of the pandemic. This exploratory study examines predictors of parental intentions to vaccinate their children and the speed with which they would have them vaccinated during the fifth wave of the pandemic when vaccines were just being approved for use in children using a convenience sample of 641 parents reporting on 962 children. Multi-level regression analyses demonstrated regional differences in likelihood, with those in the Northeast reporting higher likelihood than those in the West. Parents with a conservative belief system were less likely to want to have their children vaccinated. Parents were more likely to have their child vaccinated if the child had COVID-19-related health risks, their child had a more complete vaccination history, and COVID-19 was perceived to be a greater threat to oneself and one’s family. Faster intended vaccination speed was associated with regional urbanicity, liberal belief systems, more complete vaccination histories, and parental COVID-19 vaccination history. Higher levels of parental anxiety and lower levels of perceived vaccine danger were associated with increased speed. The severity of the COVID-19 pandemic within one’s county was marginally related to speed, but not likelihood. These results underscore the importance of regular assessment of parental intentions across the pandemic, for practitioners to probe parental anxiety levels when discussing vaccination, to explicitly address risk/benefit analyses when communicating with parents, and to target previously routine unvaccinated parents and those in more rural areas to increase vaccine uptake. Comparisons are made with Galanis et al.’s (2022) recent meta-analysis on the topic.