This study operationalized and empirically tested the general propositions of Gottfredson and Hirschi's general theory of crime (1990). Specifically, the core concept of the theory, self-control, is operationalized using two data sets--Richmond Youth Project and Cambridge Study in Delinquent Development--and tested using criteria of reliability and validity. In this part of the study, a methodological question focuses on the pattern of validity change across types of data, namely, cross-sectional and longitudinal data. In the following tests, causes and consequences of low self-control are tested using Richmond Youth Project data. Child rearing as early socialization and individual traits are tested as sources of self-control. Then the measure of self-control is related to crime, delinquency, and analogous behaviors that are, according to the theory, manifestations of low self-control. A research question here focuses on the generality of self-control theory. Overall, the test results support the claims of the general theory of crime. Findings from the validity tests of the self-control index show theoretically expected relations with important individual variables such as gender, race, and delinquent status. In particular, findings from two differently designed data sets are very similar. Test results also show that boys low on self-control are more likely than others to have committed crime, delinquency, and various analogous behaviors. One possible research problem based on the theoretical assumption was also tested and empirically supported. Theory implies that respondents low on self-control are more likely than others to fail to answer questions in self-report survey. Empirical tests support this theoretical implication, revealing that respondents dropped from the index due to missing data are more likely than others to be delinquents. Further research implications are also discussed.

Child sexual abuse is a pervasive crime that has numerous negative short and long-term impacts on its victims, as well as negative impacts for society. Modus Operandi (MO) is defined as a pattern of perpetration utilized by those who commit CSA to successfully abuse a child without detection. Understanding how CSA is perpetrated through MO is essential, as this construct influences both prevention of CSA, and treatment for victims and perpetrators. The Modus Operandi Questionnaire (Kaufman, 1991; MOQ) is the first and most comprehensive measurement tool for CSA MO, and is utilized by both researchers and clinicians. This study provides an up-to-date factor analysis of the MOQ, breaking the measure into five stage-based scales (i.e.; Accessing the victim, Gaining the victim's trust, Gaining the victim's cooperation, Sexual Abuse, and Silencing after the abuse). Each stage-based scale was analyzed through Exploratory Factor Analysis to determine structure followed by a Confirmatory Factor Analysis to examine model fit, as well as loadings of first-order factors onto their respective stage-based second order factors. Although model fit for all five scales can be improved, the results of this study determined reliable factors within all five scales, and show a structure that can be utilized to further inform research, treatment, and prevention of CSA.

A significant proportion of child sexual abuse perpetration is committed by juvenile sexual offenders (JSOs), a subgroup of offenders whose patterns of offending, or "modus operandi," have been found to be markedly different compared to their adult counterparts (Kaufman et al., 1996; Kaufman et al., 1998). Many of these JSOs commit sexual abuse perpetration while acting as a babysitter, or a temporary supervisor to their victim. The present study investigates the routine activities of JSOs and their victims’ caregivers that are associated with the JSO being placed into a supervisory role. The study also investigates subgroup differences in the use of modus operandi strategies between JSO supervisors and non-supervisors. Data from this study included 370 JSO participants from four states. Results indicated that parents needs for childcare assistance predicts JSO supervisor status over perpetrators efforts to get the child alone and disruptions to parents lives. Furthermore, JSO acting as a supervisor was associated with more frequent use of modus operandi strategies overall and more frequent use of bribes and enticements to gain their victim’s compliance. There were no differences between JSO supervisors and non-supervisors on the threats and coercion subscale. Finally, no victim characteristics, JSO characteristics, or disruptions to parents lives, significantly moderated the relationship between JSO supervisor status and strategic grooming. Findings have important implications for research and policy related to child sexual abuse prevention and intervention.

In this dissertation, I present three manuscripts to investigate the prevention of a range of crimes committed against, and by, youth, using parental monitoring or guardianship. In the first paper, I tested whether the routine activities of juvenile sexual offenders (JSOs) and their victims' caregivers was associated with the JSO being placed into a supervisory role, and whether subgroup differences existed in the use of modus operandi strategies between JSO supervisors and non-supervisors (Chapter II). Findings indicated that parents' need for childcare assistance predicted JSO supervisor status more strongly than perpetrators efforts to get the child alone or disruptions to parents' lives. Furthermore, JSOs acting as a temporary caregiver to the child they abused was associated with more frequent use of modus operandi strategies overall and more frequent use of bribes and enticements to gain their victims' compliance. There were no differences between JSO supervisors and non-supervisors on the threats and coercion modus operandi (MO) subscale, and moderators between JSO supervisor status and strategic grooming strategies were not found to be significantly related. The second paper used a series of MANCOVAs to investigate whether differences in parental monitoring exist between JSOs, Juvenile Delinquent (JDs) nonsexual offenders, and non-offending Juvenile Controls (JCs; Chapter III). Findings suggest that JSOs report lower parental knowledge, parental solicitation, and parental control, compared to JCs, but for certain items, they report higher levels of all three compared to JDs. They also differed from JDs such that they reported lower levels of perceived parental monitoring. Finally, the third study focused on the development of a quantitative scale measuring technology-based parental monitoring (Chapter IV). The resulting measure will help future researchers determine whether parents' engagement with different forms of technology to communicate with their youth leads to differential outcomes for those youth, such as decreased delinquency and victimization. In sum, the first study investigates how JSOs end up in supervisory roles, and how their MO differs from non-supervisors, the second study looks at differences in parental monitoring between JSOs, juvenile non-sexual offenders, and community controls, and the third study described the development of a measure of technology-based parental monitoring. This dissertation is the first to apply both psychological and criminological perspectives to the prevention of youth offending and victimization through monitoring and other related concepts.

This research examines the content and process involved in developing criminal profiles. To assess the material typically included in profiles and the way that the conclusions are developed, a qualitative analysis of the content of profiles was undertaken. This included, among other things, the characteristics offered, their prevalence, and the most common characteristics by profiling method. A further quantitative study was undertaken employing Multidimensional Scaling (MDS) which revealed three general themes in the advice given. These included Crime Scene, Internal Offender and Offender Characteristic facets, each of which was comprised of features suggestive of that facet. For example, the Crime Scene facet typically described offender actions and their interpretation at the physical location of the criminal event, such as staging and methods of control.The study employed a sample of 49 profilers reflective of the four main schools of thought; Criminal Investigative Analysis (CIA), Investigative Psychology (IP), Diagnostic Evaluations (DE) and Behavioural Evidence Analysis (BEA). CIA profiles were greatest in number with a sample size of 19. There were 14 BEA profiles and 8 each of DE and IP profiles. Together, there were in excess of 3000 individual variables ranging from age, sex and race to employment, geography, mental illness and risk.Results indicate that the vast majority of profilers employ either research or personal belief in forming their opinions, and that physical evidence is used the least in justifying a profiler’s opinion. However, when considering the individual methods, BEA placed the greatest reliance on physical evidence and its interpretation according with the forensic science philosophy of the method. CIA, the method used by the FBI, produced the most characteristics of the sample at 312 across 19 profiles, followed by BEA at 166 characteristics across 14 profiles. IP and DE profiles, with a sample size of eight each, had 90 and 61 characteristics respectively.Beyond these findings, the implication of the research will be discussed and some future direction for this research and the field in general will be provided. These areas include education, training, the scientific method and professionalisation. This thesis will also canvass the issue of whether profiling is an art or a science with particular reference to the research results and the existing literature that has bothered to address this issue.

This research examines the content and process involved in developing criminal profiles. To assess the material typically included in profiles and the way that the conclusions are developed, a qualitative analysis of the content of profiles was undertaken. This included, among other things, the characteristics offered, their prevalence, and the most common characteristics by profiling method. A further quantitative study was undertaken employing Multidimensional Scaling (MDS) which revealed three general themes in the advice given. These included Crime Scene, Internal Offender and Offender Characteristic facets, each of which was comprised of features suggestive of that facet. For example, the Crime Scene facet typically described offender actions and their interpretation at the physical location of the criminal event, such as staging and methods of control.The study employed a sample of 49 profilers reflective of the four main schools of thought; Criminal Investigative Analysis (CIA), Investigative Psychology (IP), Diagnostic Evaluations (DE) and Behavioural Evidence Analysis (BEA). CIA profiles were greatest in number with a sample size of 19. There were 14 BEA profiles and 8 each of DE and IP profiles. Together, there were in excess of 3000 individual variables ranging from age, sex and race to employment, geography, mental illness and risk.Results indicate that the vast majority of profilers employ either research or personal belief in forming their opinions, and that physical evidence is used the least in justifying a profiler’s opinion. However, when considering the individual methods, BEA placed the greatest reliance on physical evidence and its interpretation according with the forensic science philosophy of the method. CIA, the method used by the FBI, produced the most characteristics of the sample at 312 across 19 profiles, followed by BEA at 166 characteristics across 14 profiles. IP and DE profiles, with a sample size of eight each, had 90 and 61 characteristics respectively.Beyond these findings, the implication of the research will be discussed and some future direction for this research and the field in general will be provided. These areas include education, training, the scientific method and professionalisation. This thesis will also canvass the issue of whether profiling is an art or a science with particular reference to the research results and the existing literature that has bothered to address this issue.

The rather novel phenomenon of cybergrooming, or the solicitation of minors for sex via the Internet, has yet to be fully explored. This is a problem because such predatory behavior can lead to psychological and/or physical abuse of minors. The present study seeks to fill this knowledge by performing a qualitative, grounded theory analysis of naturally-occurring cybergrooming discourse. Data were drawn from the website of the online watchdog group, Perverted Justice. The first 20 lines of talk transmitted by the adults in these chat conversations were sampled from 100 transcripts published by Perverted Justice.Multi-step coding, facilitated by the qualitative analysis software Atlas.ti, revealed 11 themes of social action that discursively emerged in at least 25% of said transcripts: (1) conversational openings; (2) initial solicitation of age, sex and/or location; (3) specific questions regarding 'child's' life; (4) follow-up topicalization of 'child's' location; (5) seeking visual images of 'child;' (6) complimenting 'child's' appearance; (7) soliciting topic for discussion; (8) explicitly sexual statements; (9) soliciting 'child's' age preference for sex/romance; (10) arranging further contact; and (11) disclosing personal activities. These themes are then explored in their own context, in relation to each other, and as elements of the broad behavioral framework of cybergrooming.

Text in Afrikaans / In die ondersoek na die modus operandi van die bankrower: 'n kriminologiese introspeksie, kan die ondergemelde drie dimensies onderskei word: Die eerste dimensie is 'n kriminologiese introspeksie wat die betekenis wat bankrowers self aan die uitvoer van bankrooftogte heg, behels. Hierdie leefwereld van die subjekte word deur die navorser "betree" en mede-verken. Doelgerigtheid, morele oorwegings, teesin in geweld, charisma, kognitiewe vermoens en 'n materialistiese ingesteldheid is begrippe wat die bankrower as mens belig. Die tweede dimensie word verteenwoordig deur die begrondingsteorie as navorsingsmetode, gebaseer op die werk van Strauss en Corbin {1990), wat toegepas word ten einde sodanige navorsingsdoelstelling te fasiliteer. Tydens die aanvanklike fase van die ondersoek is daar met 28 bankrowers in aanhoud i ng, gefokusde semi -gest ruktureerde ind i epte-onderhoude gevoer. Opvolgonderhoude is met ses van die 28 subjekte gevoer, met die doel om 'n substantiewe begrondingsteorie te ontplooi, verskille op te klaar en die geldigheid van die data te verhoog. Die derde dimensie reflekteer vervolgens die ontplooiing van 'n substantiewe begrondingsteorie wat weerspieel word in proposisies en wat in vier fases van die modus operandi van die bankrower onderskei word, naamlik die beplanning-; uitvoering-; afhandeling-; en heroorwegingsfase. Elk van die ge'identifiseerde fases word gekenmerk deur progressiewe beweging, natuurlike kontinu'iteit, emosionele belewenisse en 'n individualistiese inslag. Twee kernelemente, naamlik besluitneming en rasionaliteit staan prominent binne die kader van die modus operandi van die bankrower. Die substantiewe begrondingsteorie is daarop ingestel om die verskynsel wat bestudeer word, te verklaar. Seide die oorweging van die ondersoek asook ander doelstellings van die navorser word binne die teorie geakkommodeer. Verdere vergelykende studies kan daartoe bydra om die substantiewe begrondingsteorie te verfyn, te falsifiseer, 6f by gebrek daaraan, tot 'n formele teorie uit te bou. Derhalwe word die begrondingsteorie as navorsingsmetode nie slegs as toepaslik beskou vir toekomstige navorsing oor onderwerpe waaroor daar 'n gebrek aan empiriese bevindinge bestaan en waaroor relatief min kennis in kriminologiese literatuur voorkom nie, maar hou dit ook die voordeel van 'n pluriforme navorsingstudie in. / In the investigation into the modus operandi of the bank robber: a criminological introspection, three dimensions can be distinguished. The first dimension is a criminological introspection comprising the meaning attached by bank rob.bers to the execution of bank robberies. This world of the subjects is entered and co-scouted. Sense of purpose, mora 1 considerations, aversion to violence, charisma, cognitive powers and a materialistic disposition are conceptions that elucidate the bank robber as a human. The second dimension is represented by the grounded theory as research method, based on the work of Strauss and Corbin (1990), which are applied to facilitate such research aims. During the initial phase of the investigation, focused, semi-structured, in-depth interviews were held with 28 bank robbers in detention. Subsequent interviews were held with six of the 28 subjects, aimed at expanding a substantive grounded theory, to clear up differences and to increase the validity of the data. The third dimension reflects the development of a substantive grounded theory which is revealed in propositions and signalised in four phases of the bank robber's modus operandi, namely the planning, execution, disposal and reconsideration phases. Each of these identified phases is characterised by progressive movement, natura 1 continuity, emot i ona 1 experiences and an individualistic infusion. The basic elements, namely decision-making and rationalisation, are prominent in the cadre of the bank robber's modus operandi. The substantive grounded theory is aimed at explaining the study phenomenon. Consideration of the investigation as well as other aims of the researcher are accommodated in the theory. Further comparative studies can assist in refining or falsifying the substantive grounded theory or, failing, to expand it to a formal theory. The grounded theory is therefore regarded as appropriate for future research on subjects about which there is a lack of empirical findings and relatively little knowledge in criminological literature. The theory offers, in addition, the advantage of a pluriform research study. / Sociology / D. Litt et Phil. (Kriminologie)

Text in Afrikaans / In die ondersoek na die modus operandi van die bankrower: 'n kriminologiese introspeksie, kan die ondergemelde drie dimensies onderskei word: Die eerste dimensie is 'n kriminologiese introspeksie wat die betekenis wat bankrowers self aan die uitvoer van bankrooftogte heg, behels. Hierdie leefwereld van die subjekte word deur die navorser "betree" en mede-verken. Doelgerigtheid, morele oorwegings, teesin in geweld, charisma, kognitiewe vermoens en 'n materialistiese ingesteldheid is begrippe wat die bankrower as mens belig. Die tweede dimensie word verteenwoordig deur die begrondingsteorie as navorsingsmetode, gebaseer op die werk van Strauss en Corbin {1990), wat toegepas word ten einde sodanige navorsingsdoelstelling te fasiliteer. Tydens die aanvanklike fase van die ondersoek is daar met 28 bankrowers in aanhoud i ng, gefokusde semi -gest ruktureerde ind i epte-onderhoude gevoer. Opvolgonderhoude is met ses van die 28 subjekte gevoer, met die doel om 'n substantiewe begrondingsteorie te ontplooi, verskille op te klaar en die geldigheid van die data te verhoog. Die derde dimensie reflekteer vervolgens die ontplooiing van 'n substantiewe begrondingsteorie wat weerspieel word in proposisies en wat in vier fases van die modus operandi van die bankrower onderskei word, naamlik die beplanning-; uitvoering-; afhandeling-; en heroorwegingsfase. Elk van die ge'identifiseerde fases word gekenmerk deur progressiewe beweging, natuurlike kontinu'iteit, emosionele belewenisse en 'n individualistiese inslag. Twee kernelemente, naamlik besluitneming en rasionaliteit staan prominent binne die kader van die modus operandi van die bankrower. Die substantiewe begrondingsteorie is daarop ingestel om die verskynsel wat bestudeer word, te verklaar. Seide die oorweging van die ondersoek asook ander doelstellings van die navorser word binne die teorie geakkommodeer. Verdere vergelykende studies kan daartoe bydra om die substantiewe begrondingsteorie te verfyn, te falsifiseer, 6f by gebrek daaraan, tot 'n formele teorie uit te bou. Derhalwe word die begrondingsteorie as navorsingsmetode nie slegs as toepaslik beskou vir toekomstige navorsing oor onderwerpe waaroor daar 'n gebrek aan empiriese bevindinge bestaan en waaroor relatief min kennis in kriminologiese literatuur voorkom nie, maar hou dit ook die voordeel van 'n pluriforme navorsingstudie in. / In the investigation into the modus operandi of the bank robber: a criminological introspection, three dimensions can be distinguished. The first dimension is a criminological introspection comprising the meaning attached by bank rob.bers to the execution of bank robberies. This world of the subjects is entered and co-scouted. Sense of purpose, mora 1 considerations, aversion to violence, charisma, cognitive powers and a materialistic disposition are conceptions that elucidate the bank robber as a human. The second dimension is represented by the grounded theory as research method, based on the work of Strauss and Corbin (1990), which are applied to facilitate such research aims. During the initial phase of the investigation, focused, semi-structured, in-depth interviews were held with 28 bank robbers in detention. Subsequent interviews were held with six of the 28 subjects, aimed at expanding a substantive grounded theory, to clear up differences and to increase the validity of the data. The third dimension reflects the development of a substantive grounded theory which is revealed in propositions and signalised in four phases of the bank robber's modus operandi, namely the planning, execution, disposal and reconsideration phases. Each of these identified phases is characterised by progressive movement, natura 1 continuity, emot i ona 1 experiences and an individualistic infusion. The basic elements, namely decision-making and rationalisation, are prominent in the cadre of the bank robber's modus operandi. The substantive grounded theory is aimed at explaining the study phenomenon. Consideration of the investigation as well as other aims of the researcher are accommodated in the theory. Further comparative studies can assist in refining or falsifying the substantive grounded theory or, failing, to expand it to a formal theory. The grounded theory is therefore regarded as appropriate for future research on subjects about which there is a lack of empirical findings and relatively little knowledge in criminological literature. The theory offers, in addition, the advantage of a pluriform research study. / Sociology / D. Litt et Phil. (Kriminologie)

Research on the modus operandi (“method of operation”) of child sexual abuse (CSA) offenders has been useful in informing successful prevention programs (LeClerc, 2009). However, a gap in the literature regarding the strategies offenders use to lure potential CSA victims still remains. The present study seeks to examine the effects of offender-victim relationship and offender age on the use of strategies to lure victims for the purpose of committing CSA. Data for this study is taken from a larger investigation which included 854 identified adolescent and adult CSA offenders from nine different states. A 2 X 2 MANCOVA analysis revealed significant group differences for the each of the subgroups of interest in their use of threats and coercion to lure victims for the purpose of committing CSA. More specifically, it was found that adolescent CSA offenders utilize threats and coercion with a greater frequency than adult CSA offenders and intra-familial CSA offenders utilize threats and coercion with a greater frequency than extra-familial CSA offenders. Follow up analyses at the item level indicated group differences on multiple items (i.e., specific strategies) comprising the subscales used. The implications of these findings for treatment and prevention work in this area are discussed, as are policy impacts. Finally, suggestions for future research are provided.