Experimental and numerical studies of hydrodynamic interaction of two bodies in waves

This thesis focuses on experimental and numerical studies of the hydrodynamic interaction between two vessels in close proximity in waves. In the model tests, two identical box-like models with round corners were used. Regular waves with the same wave steepness and different wave frequencies were generated. Six degrees of freedom body motions and wave elevations between bodies were measured in a head sea condition. Three initial gap widths were examined. In the numerical computations, a panel-free method based seakeeping program, MAPS0, and a panel method based program, WAMIT, were used for the prediction of body motions and wave elevations. The computed body motions and wave elevations were compared with experimental data.

A comparison of modality effect performance in children: how reading achievement performance is influenced by echoic memory

This study investigates if less skilled readers suffer from deficits in echoic memory, which may be responsible for limiting the progress of reading acquisition. Serial recall performance in auditory, visual, and noisy conditions was used to assess echoic memory differences between skilled and less skilled readers. Both groups showed the typical modality effect, demonstrating that each had a functioning echoic memory. Less skilled readers performed more weakly than skilled readers on noisy serial recall, suggesting that the recall of less skilled readers is more vulnerable to interference than the recall of skilled readers. Nonword repetition performance indicated that all participants had reduced recall as a function of word complexity and word length. No difference between reading groups was found on this task; however, as nonword repetition and size of modality effect did not correlate, this task may not be a measure of echoic memory.

Ritual and routine: a means of adaption

Researchers have demonstrated how engaging in rituals or ‘patterned’ behaviours can help people cope with stressful situations and significant life changes. However, limited knowledge exists on the role of ritual practices in prison and how federally incarcerated Canadian men use these rituals to deal with their imprisonment. To respond to this lacuna in the literature, transcripts from 56 semi-structured interviews with former male federal prisoners released on parole into Ontario, Canada, were analyzed for emergent themes identifying the purpose of ritual and routine practices across prisons with different security classifications. Findings reveal the effectiveness of rituals for managing and mitigating the stresses of incarceration, specifically that prisoners’ routine behaviours constitute a positive strategy of adaption to incarceration (e.g., alleviating stress and passing time) in preparation for life postincarceration (e.g., anticipatory socialization). Structural Ritualization Theory frames the analyses and implications presented in this study.

The effect of note taking on memory for details in investigative interviews

Across 3 experiments, the effect of different styles of note taking, summary and access to notes was examined for memory for the details contained in a witness interview. In Experiment 1, participants (N = 40) were asked to either take notes or listen as they watched a witness interview. In Experiment 2, participants (N = 84) were asked to either take notes in one of three ways (i.e., conventional, linear, spidergraph) or listen as they watched a witness interview. In Experiment 3, participants (N = 112) were asked to take notes using the conventional or spidergraph method of note taking while they watched a witness interview and were subsequently given an opportunity to review their notes or sit quietly. Participants were then either granted access to their notes during testing or were not provided with their notes. Results of the first two experiments revealed that note takers outperformed listeners. Experiment 2 showed that conventional note takers outperformed those who used organizational styles of note taking, and post-hoc analyses revealed that recall performance was associated with note quality. Experiment 3 showed that participants who had access to their notes performed the best. The implications of these findings for police training programs in investigative interviewing are discussed.

Modeling the distribution of crossovers and interference with mice DNA data

Chiasma and crossover are two related biological processes of great importance in the understanding genetic variation. The study of these processes is straightforward in organisms where all products of meiosis are recovered and can be observed. This is not the case in mammals. Our understanding of these processes depends on our ability to model them. In this study I describe the biological processes that underline chiasma and crossover as well as the two main inference problems associated with these processes: i) in mammals we only recover one of the four products of meiosis and, ii) in general, we do not observe where the crossovers actually happen, but we find an interval containing type-2 censored information. NPML estimate was proposed and used in this work and used to compare chromosome length and chromosome expansion through the crosses.

Packings and coverings of the complete graph with trees

In this thesis, we define the spectrum problem for packings (coverings) of G to be the problem of finding all graphs H such that a maximum G-packing (minimum G- covering) of the complete graph with the leave (excess) graph H exists. The set of achievable leave (excess) graphs in G-packings (G-coverings) of the complete graph is called the spectrum of leave (excess) graphs for G. Then, we consider this problem for trees with up to five edges. We will prove that for any tree T with up to five edges, if the leave graph in a maximum T-packing of the complete graph Kn has i edges, then the spectrum of leave graphs for T is the set of all simple graphs with i edges. In fact, for these T and i and H any simple graph with i edges, we will construct a maximum T-packing of Kn with the leave graph H. We will also show that for any tree T with k ≤ 5 edges, if the excess graph in a minimum T-covering of the complete graph Kn has i edges, then the spectrum of excess graphs for T is the set of all simple graphs and multigraphs with i edges, except for the case that T is a 5-star, for which the graph formed by four multiple edges is not achievable when n = 12.

Perceptions of Social Supports and Services for Intimate Partner Violence Victims

Intimate partner violence (IPV) is a complex issue. The present study explored how media exposure to female and male victims of IPV affected participants’ support for both groups. It was hypothesized that female victims would be supported more than male victims and that presenting stimuli that drew attention to male victims would not decrease support for female victims. Participants were presented with one of three posters, drawing attention to male victims, female victims, or both. A questionnaire was then used to assess perceptions of support for IPV victims, which was completed by 121 participants. Results indicated that females were supported more than males and that drawing attention to male victims did not decrease participants’ support for female victims. An exploratory analysis also revealed that women, overall, have high support for all victims, while men’s level of support changed depending on the type of information to which they were exposed.

Crime and prejudice: The influence of appearance on blame amongst perpetrators and victims

Stereotypes based on characteristics such as age, race, and gender influence opinions in a criminal context. Yet, to date research has largely assessed whether perpetrators, rather than victims, are judged differently. Furthermore, although facial features can be a source of unconscious bias, research has failed to assess whether perceptions based on facial features affect the criminal context. To better understand the relationship between stereotypic facial features and gender, and whether this varies across perpetrators and victims, participants were asked to answer questions about an aggravated assault scenario after viewing an image of a person described as the victim or the alleged perpetrator. Images varied in gender and in presence or absence of tattoos or gothic makeup. Participants sympathized with the victim regardless of gender, but discrepancies were stronger if the victim was female than male. Neutral and tattooed faces were judged more harshly than faces with gothic makeup, regardless of gender.

Evaluating Public Knowledge of the NCRMD Defence

The not criminally responsible on account of mental disorder (NCRMD) defence is used when claims can be made that offenders are not responsible for their actions due to symptoms of a mental disorder. Bill C-14, now enacted in Canada, has implemented changes making it more difficult for NCRMD defendants to be released back into the public. This enactment appears to have been primarily due to public perceptions rather than actual knowledge of the defence. Thus it seems important to assess what members of the public actually know about the defence. To assess this, 127 participants completed a survey assessing their knowledge of the illnesses generally involved in the NCRMD defence, crimes committed, and punishments received. On average, only 31.6% of responses were answered within 20% of the factual statistics. Results suggest a general lack of knowledge about the defence and demonstrate why important changes should be based on factual information rather than public opinion.

Effect of Experience on Alibi Generation and Expectation

Members of the general population have high expectations of people who are asked to corroborate an alibi for the suspect of a crime. The general belief is that it is easy to provide an alibi if a person is innocent, and therefore guilt should be assumed when an alibi cannot be provided. The possibility that having to generate an alibi oneself could influence expectations was examined. Additionally, potential changes in opinion after being provided with positive or negative feedback were explored. Results showed a significant difference in expectations based on whether participants were correct or incorrect in identifying the suspect, that is, whether participants were able to provide an alibi. Those who were incorrect had lower expectations of themselves and of others than those who were correct. Making jurors aware of the difficulty in providing an alibi may lead to fairer treatment of suspects who have difficulty providing one.

Exploring the Role of Parental Hearsay when Children Witness a Crime

In cases of potential child abuse, parents may provide hearsay testimony on behalf of a child, retelling events from the child’s perspective. However, according to the limited research that exists, parents may have a negative impact on their child’s memory of an event (Principe, DiPuppo, & Gammel, 2013). In order to gain a better understanding of parental hearsay, parents’ descriptions of information children provided in recorded parent-child discussions were compared to the actual information the children provided in the initial discussion and in a 1-week follow-up interview. Children interviewed by parents were also compared to children interviewed by a trained interviewer. To date, 11 children between the ages of 6-9 years have been assessed. While the current sample size was too small to yield many significant results, graphs and effect sizes suggest there are differences in memory accuracy and completeness between parents and children and across children’s interview condition. Whether hearsay testimony or children’s testimony is preferable may depend on how suggestive the initial parent-child discussion is.

Educational Videos and Exposure to Nature as Predictors of Environmentally Responsible Behaviours among University Students

The purpose of this study was to examine if the effects of exposure to educational videos on climate change and exposure to a view of nature could elicit environmentalist behaviours and increase one’s environmental identity. It was predicted that participants who were exposed to a view of nature and saw a video on climate change would have a higher likelihood to plant a seed and experience greater connectedness to nature. Fifty-four students (38 females, 15 males, and 1 gender fluid) with ages ranging from 18 to 47 were recruited for the experiment. A 2 (type of video) x 2 (type of view) factorial design was conducted, in which participants were randomly assigned to watch either an educational video on climate change or on popsicles, and they either had a view of outdoors or indoors. There was no significant interaction for setting and video (p = .172) on whether participants chose to plant a seed or not. Likewise, there was no significant interaction for setting and video (p = .262) on planting intentions. There was a significant effect for the video on experiencing connection to nature (p = .039, ηp2 = .08). These findings suggest that this video could change one’s perception of nature.

The Self as a Moral Basis: Do Our Own Patterns of Behavior Affect our Moral Attributions?

To determine which actions are morally acceptable, psychologists typically focus on decision making within existing moral paradigms. However, this fails to comment upon individual and social processes, such as attribution, that determine morality. To address these processes, this study had participants respond to morally-charged scenarios by rating the immorality of an actor who did not tip a waiter (n = 125), was partial to infidelity (n = 128), and texted while driving (n = 128). Participants also completed an empathy measure, and provided their own frequency of engaging in certain behaviors, including those featured in the scenarios. Immorality ratings were compared to the participants’ own frequency of the scenario action (hypothesized to lower ratings), as well as empathy and outcome severity (both hypothesized to increase ratings). Findings were assessed in three regressions, one per scenario. Behavioral similarity predicted immorality ratings in each (p ≤ .03), empathy predicted ratings only for not tipping a waiter (p = .04), while outcome severity was un-predictive in each scenario. Theoretical implications, directions for future research, and limitations of the study are discussed.

Lie detection and children: Impact of the mode of presentation

Although a great deal of research has examined lie-detection among adults, little research has examined the differences between audio and visual mediums for deception among children. In the current study participants were presented (n = 42) with recordings of four children, each describing his/her experience of getting glasses. Two of the accounts were truthful, two were fabricated. Half of the participants were presented with videos, half were presented with audio-recordings. Following the presentation of each recording, participants responded to questions regarding the truthfulness of each child’s account. Results showed that when evaluating truth-tellers, participants’ lie-detection accuracy was significantly greater than chance. Within the video condition, non-parents were shown to report significantly more lie-related cues than parents. Several deception cues were shown to be related to lie-detection accuracy.