著者
横田 賀英子 大塚 祐輔 倉石 宏樹 和智 妙子 渡邉 和美
出版者
日本法科学技術学会
雑誌
日本法科学技術学会誌 (ISSN:18801323)
巻号頁・発行日
vol.19, no.1, pp.19-30, 2014 (Released:2014-02-04)
参考文献数
15

Characteristics of male offenders arrested in Japan for exhibitionism (N = 414) and features of their offences were investigated. In analyses, their behavioral consistency was also examined by focusing on 87 repeat exhibitionists. The results indicated that many offenders were well-adjusted persons: 71% were employed, 30% were married, and 23% were graduates. Moreover, 66% of the offences were committed in daytime, and 64% targeted victims aged 10-20 years. In 24% of cases, the distances between offenders' residences and crime scenes were less than one kilometer, whereas 40% of offenders lived over 5 kilometers away. In terms of behavioral consistency, offences in “trains or buses” and public spaces were shown to be consistent for repeated arrests, even after taking the occurrence rate into consideration by measures of adjusted standardized residual (ASR) and forward specialization coefficient (FSC), which is suggestive of behavioral consistency. Finally, less frequent behaviors, such as nighttime offences and offences targeting victims aged 30 years or older occurred less consistently in the series of offences. The results suggested that many exhibitionists rationally decided when and where to commit crimes, based on their calculation of risk and reward. The fact that many offenders were well-adjusted persons might be one of factors explaining offender's rational decision making. The findings in the current study can contribute to the police investigation to prioritize their investigative targets. The current research can form the basis of understanding of the nature of male exhibitionists.
著者
横田 賀英子 渡邉 和美 和智 妙子 大塚 祐輔 倉石 宏樹 藤田 悟郎
出版者
公益社団法人 日本心理学会
雑誌
心理学研究 (ISSN:00215236)
巻号頁・発行日
(Released:2015-05-28)
参考文献数
37
被引用文献数
7 or 0

The purpose of this study was twofold: first, to create an index for a behavioral linkage analysis of serial sex crimes, and second, to construct a predictive model for the analysis. Data on 720 sex crimes (rape, indecent assault) committed by 360 offenders arrested between 1993 and 2005 throughout Japan were collected. The following seven behaviors were examined during a series of analyses aimed at illustrating the effectiveness of crime linkage in serial sex crimes: victim age group, area type, publicness of offense site, weapon, time, contact method, and day of the week. The results indicated that six of the seven behaviors (excluding “day of the week”) significantly distinguished between linked and unlinked crime pairs. Under a logistic regression of these six variables, which were dichotomously coded in terms of the concordance or discordance between each pair of incidents, the area under the receiver operating characteristic (ROC) curve was 0.85 (95% CI = 0.82–0.87), indicating a high level of discriminative accuracy in identifying disparate sex crimes committed by the same person.
著者
横田 賀英子 渡邉 和美 和智 妙子 大塚 祐輔 倉石 宏樹 藤田 悟郎
出版者
公益社団法人 日本心理学会
雑誌
心理学研究 (ISSN:00215236)
巻号頁・発行日
vol.86, no.3, pp.209-218, 2015 (Released:2015-08-25)
参考文献数
37
被引用文献数
7 or 0

The purpose of this study was twofold: first, to create an index for a behavioral linkage analysis of serial sex crimes, and second, to construct a predictive model for the analysis. Data on 720 sex crimes (rape, indecent assault) committed by 360 offenders arrested between 1993 and 2005 throughout Japan were collected. The following seven behaviors were examined during a series of analyses aimed at illustrating the effectiveness of crime linkage in serial sex crimes: victim age group, area type, publicness of offense site, weapon, time, contact method, and day of the week. The results indicated that six of the seven behaviors (excluding “day of the week”) significantly distinguished between linked and unlinked crime pairs. Under a logistic regression of these six variables, which were dichotomously coded in terms of the concordance or discordance between each pair of incidents, the area under the receiver operating characteristic (ROC) curve was 0.85 (95% CI = 0.82–0.87), indicating a high level of discriminative accuracy in identifying disparate sex crimes committed by the same person.
著者
和智 妙子 渡邉 和美 横田 賀英子 大塚 祐輔 Lamb Michael E.
出版者
公益社団法人 日本心理学会
雑誌
心理学研究 (ISSN:00215236)
巻号頁・発行日
(Released:2016-11-10)
参考文献数
19

This study examined the relationships between the reasons for confessions and interviewing styles by administering a self-reported questionnaire to new male adult prison inmates across Japan. The three factors proposed by Gudjonsson and his colleagues (1991, 1992, 1994, 1999), namely, perception of proof, internal pressure, and external pressure, were investigated. When participants had decided to confess prior to interviews, they were more likely to confess due to perception of proof and internal pressure compared to their counterparts. Furthermore, participants who experienced a relationship-focused interviewing style, which stressed active listening and rapport-building while talking about the criminal incidents directly, were more likely to confess due to internal pressure and less likely to confess due to external pressure.
著者
横田 賀英子 大塚 祐輔 倉石 宏樹 和智 妙子 渡邉 和美
出版者
Japanese Association of Forensic Science and Technology
雑誌
日本法科学技術学会誌 (ISSN:18801323)
巻号頁・発行日
vol.19, no.1, pp.19-30, 2014

Characteristics of male offenders arrested in Japan for exhibitionism (<i>N</i> = 414) and features of their offences were investigated. In analyses, their behavioral consistency was also examined by focusing on 87 repeat exhibitionists. The results indicated that many offenders were well-adjusted persons: 71% were employed, 30% were married, and 23% were graduates. Moreover, 66% of the offences were committed in daytime, and 64% targeted victims aged 10-20 years. In 24% of cases, the distances between offenders' residences and crime scenes were less than one kilometer, whereas 40% of offenders lived over 5 kilometers away. In terms of behavioral consistency, offences in "trains or buses" and public spaces were shown to be consistent for repeated arrests, even after taking the occurrence rate into consideration by measures of adjusted standardized residual (ASR) and forward specialization coefficient (FSC), which is suggestive of behavioral consistency. Finally, less frequent behaviors, such as nighttime offences and offences targeting victims aged 30 years or older occurred less consistently in the series of offences. The results suggested that many exhibitionists rationally decided when and where to commit crimes, based on their calculation of risk and reward. The fact that many offenders were well-adjusted persons might be one of factors explaining offender's rational decision making. The findings in the current study can contribute to the police investigation to prioritize their investigative targets. The current research can form the basis of understanding of the nature of male exhibitionists.<br>
著者
和智 妙子 渡邉 和美 横田 賀英子 大塚 祐輔 Lamb Michael E.
出版者
公益社団法人 日本心理学会
雑誌
心理学研究 (ISSN:00215236)
巻号頁・発行日
vol.87, no.6, pp.611-621, 2016 (Released:2017-02-25)
参考文献数
19

This study examined the relationships between the reasons for confessions and interviewing styles by administering a self-reported questionnaire to new male adult prison inmates across Japan. The three factors proposed by Gudjonsson and his colleagues (1991, 1992, 1994, 1999), namely, perception of proof, internal pressure, and external pressure, were investigated. When participants had decided to confess prior to interviews, they were more likely to confess due to perception of proof and internal pressure compared to their counterparts. Furthermore, participants who experienced a relationship-focused interviewing style, which stressed active listening and rapport-building while talking about the criminal incidents directly, were more likely to confess due to internal pressure and less likely to confess due to external pressure.