測謊於性侵害受刑犯否認態度之應用

目的：本研究之目的即針對南部某監獄性侵害犯，運用測謊技術，探討「否認」現象，以了解此一技術在國內的使用狀況。方法：選取40名南部某一監獄中之性侵害罪犯，實施測謊技術，特別鎖定罪犯過去性侵害史在揭露測驗(complete disclosure testing)方面之圖譜分析，以了解其性侵害史之否認現象。結果：40名性侵害罪犯個案中，在過去性侵害史測試上，有13位呈現DI(deception indicated)反應，代表有高度否認現象；11位呈現inconclusive反應，代表可能有否認現象；16位呈現NDI(no deception indicated)，代表較無否認現象。刑期長短在說謊與非說謊組有統計意義(t=-3.328, p=0.002)，而年齡、教育程度、婚姻、宗教及過去性與暴力因素則無統計相關。結論：監獄中接受強制診療之性侵害犯可能有60%採取不同程度之否認態度；另外分析也發現否認現象與個案刑期長短有明顯相關，即刑期愈長其否認現象程度愈高。

關鍵字

否認態度；測謊技術；性侵害犯

並列摘要

Objective: Most convicted sex offenders deny or minimize their crimes. Post-conviction polygraph technique examinations are increasingly used as a tool to assist in managing denial attitude in sex offenders more safely and effectively. There has been little study of the problem of denial attitude among offenders in Taiwan. This study used the complete disclosure examination to investigate the denial attitude of incarcerated male sexual offenders. Method: Forty incarcerated male sex offenders were included in this study. All of the subjects gave informed consent to undergo polygraph examination. Data obtained by complete disclosure examination were analyzed to estimate the probability of deception regarding sexual history. All data were recorded with a Lafayette 4000 Computerized Polygraph System by a certificated polygraph examiner. The charts were analysed by POLYSCORE scoring system and by an experienced examiner. Result: Chart analysis led to the classification of deception in 13 subjects, inconclusive results in 11 subjects and no deception in 16 subjects. A significant difference in the duration sentence was found between (deception indicated + inconclusive) and no deception indicated groups. No significant difference was found in age, level of education, marital status and prior sexual offense or violence record among these three groups of subjects. Conclusion: This study found that 60% of incarcerated sex offenders maintained a denial attitude during an interview with their psychiatric treatment provider. This finding suggests the importance of monitoring of the denial problem of sexual offenders by treatment professionals.