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Eur. j. psychol. appl. legal context (Internet) ; 12(1): 35-42, ene.-jun. 2020. tab
Artigo em Inglês | IBECS-Express | ID: ibc-ET1-4541


Statement Validity Assessment (SVA) proposes that baseline statements on different events can serve as a within-subject measure of a witness' individual verbal capabilities when evaluating scores from Criteria-based Content Analysis (CBCA). This assumes that CBCA scores will generally be consistent across two accounts by the same witness. We present a first pilot study on this assumption. In two sessions, we asked 29 participants to produce one experience-based and one fabricated baseline account as well as one experience-based and one fabricated target account (each on different events), resulting in a total of 116 accounts. We hypothesized at least moderate correlations between target and baseline indicating a consistency across both experience-based and fabricated CBCA scores, and that fabricated CBCA scores would be more consistent because truth-telling has to consider random event characteristics, whereas lies must be constructed completely by the individual witness. Results showed that differences in correlations between experience-based CBCA scores and between fabricated CBCA scores took the predicted direction (cexperience-based = .44 versus cfabricated =.61) but this difference was not statistically significant. As predicted, a subgroup of event-related CBCA criteria were significantly less consistent than CBCA total scores, but only in experience-based accounts. The discussion considers methodological issues regarding the usage of total CBCA scores and whether to measure consistency with correlation coefficients. It is concluded that more studies are needed with larger samples

El Statement Validity Assessment (SVA) propone que las declaraciones sobre diferentes eventos pueden servir como una línea base intrasujeto de la medida de las capacidades verbales individuales de un testigo al evaluar las puntuaciones del Criteria Based Content Analysis (CBCA). Esto implica que las puntuaciones del CBCA serán congruentes en dos relatos del mismo testigo. Presentamos un primer estudio piloto sobre este supuesto. Se pidió a 29 participantes en dos sesiones que elaboraran un relato verdadero (línea base) y otro inventado, además de un relato verdadero y otro inventado (cada uno en situaciones diferentes), arrojando un total de 116 relatos. Se planteó la hipótesis de una correlación al menos moderada entre la declaración fabricada y la verdadera, que indicaría una consistencia entre las puntuaciones en el CBCA de relatos inventados y experimentados y que las puntuaciones en el CBCA inventadas serían más consistentes porque la verdad incluye las características aleatorias de los hechos, mientras que las mentiras las construye totalmente el testigo. Los resultados mostraron que las diferencias en las correlaciones entre las puntuaciones en el CBCA de relatos experimentados y fabricados iban en la dirección predicha (cvivido = .44 frente a cinventado = .61), pero esta diferencia no fue significativa. Como se predijo, un subgrupo de criterios de CBCA relacionados con los hechos fue menos congruente que las puntuaciones totales de CBCA, pero sólo en los relatos de hechos experimentados. Se discuten las implicaciones metodológicas relacionadas con el uso de las puntuaciones totales del CBCA y si se debe medir la consistencia mediante el coeficiente de correlación. Se concluye que se necesitan otros estudios con muestras más grandes

Front Psychiatry ; 10: 168, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-30984043


Several self-report studies together with analyses of exoneration cases suggest that suspects with mental disorder are especially prone to making false confessions. The present study asked 153 forensic patients in Germany about their behavior during suspect interviewing by the police. Self-reported ground truth of guilt and innocence was asked for, thereby taking into account that the risk of false confession is present only if a person has ever been interviewed when innocent. Indeed, surveying samples that include suspects who have never been interviewed when innocent may lead to underestimating the risk of false confessions. In the present study, all patients reported having been interviewed previously when guilty; and almost two-thirds (62%, n = 95), that they had also been interviewed at least once when innocent. These participants stated that they remained silent while being interviewed significantly more often when guilty (44%) compared to when innocent (15%). This corroborates laboratory research findings indicating that the right to remain silent is waived more often by innocent than by guilty suspects. Out of all 95 participants who were ever interviewed when innocent, 25% reported having made a false confession on at least one occasion. This result is in line with previous international research showing a high percentage of false confessions among suspects with mental disorder.

Front Psychol ; 9: 855, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-29937741


In 2014, Volbert and Steller introduced a revised model of Criteria-Based Content Analysis (CBCA) that grouped a modified set of content criteria in closer reference to their assumed latent processes, resulting in three dimensions of memory-related, script-deviant and strategy-based criteria. In this model, it is assumed that deceivers try to integrate memory-related criteria-but will not be as good as truth tellers in achieving this-whereas out of strategic considerations they will avoid the expression of the other criteria. The aim of the current study was to test this assumption. A vignette was presented via an online-questionnaire to inquire how participants (n = 135) rate the strategic value of CBCA criteria on a five-point scale. One-sample t-tests showed that participants attribute positive strategic value to most memory-related criteria and negative value to the remaining criteria, except for the criteria self-deprecation and pardoning the perpetrator. Overall, our results corroborated the model's suitability in distinguishing different groups of criteria-some which liars are inclined to integrate and others which liars intend to avoid-and in this way provide useful hints for forensic practitioners in appraising the criteria' diagnostic value.