References of "Dehon, Hedwige"
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See detailIndependent recollection/familiarity ratings can dissociate: Evidence from the effects of test context on recognition of event details
Willems, Sylvie ULiege; Schroyen, Sarah ULiege; Dehon, Hedwige ULiege et al

in Canadian Journal of Experimental Psychology (2019), 73(2), 100-104

Bodner and Richardson-Champion (2007) found a dissociative effect of test context on binary remember/know judgments about a critical set of details from a film sequence. Details of medium difficulty were ... [more ▼]

Bodner and Richardson-Champion (2007) found a dissociative effect of test context on binary remember/know judgments about a critical set of details from a film sequence. Details of medium difficulty were more likely to be judged “recollected” when preceded by a set of difficult details than a set of easy details, but were similarly likely to be judged “familiar”. Using the same paradigm, we replicated this dissociation when participants independently rated recollection and familiarity. Our finding represents the first evidence that independent recollection/familiarity ratings can be dissociated. In contrast, previous studies using independent ratings have yielded parallel effects of variables that produce dissociative effects with binary judgments. Our discussion considers potential causes of this dissociation, whether test context influenced discrimination or response bias, and implications for interpreting subjective recognition experiences. Demonstrations that test context can affect recollection reports also have implications for designing and conducting eyewitness interviews. [less ▲]

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See detailHallucinations in Alzheimer's disease: failure to suppress irrelevant memories
El Haj Mohammad; Gallouj Karim; Dehon, Hedwige ULiege et al

in Cognitive Neuropsychiatry (2018)

Introduction: Research with patients with schizophrenia suggests that inhibitory dysfunction leads to the emergence of redundant or irrelevant information from long-term memory into awareness, and that ... [more ▼]

Introduction: Research with patients with schizophrenia suggests that inhibitory dysfunction leads to the emergence of redundant or irrelevant information from long-term memory into awareness, and that this process may be involved in generating hallucinations. We investigated whether inhibitory dysfunction in Alzheimer’s disease (AD) leads to hallucinations. Method: AD participants and healthy matched controls were assessed with a hallucinations scale and a directed forgetting task. On the directed forgetting task, they were asked to retain a list of 10 words (i.e., List 1). Thereafter, half of the participants were asked to forget this list whereas the other half were asked to retain the list in memory. After the List 1 presentation, all participants were asked to retain another list of 10 words and, successively, were asked to remember all of the words from both lists, regardless of the previous forget or remember instruction. Results: Relative to healthy matched controls, AD participants showed difficulties in suppressing the words from List 1. AD participants also showed more hallucinatory experiences than healthy matched controls. Interestingly, a significant correlation was observed between the score on the hallucinations measure and difficulties in suppressing List 1 in AD participants. Discussion: Hallucinations in AD may, at least in part, be related to difficulties in suppressing memory representations, such that unwanted or repetitive thoughts intrude into consciousness. [less ▲]

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See detailAssessment of a French version of the Mannheim Dream questionnaire (MADRE) in a Belgian sample
Scapin, Florence; Dehon, Hedwige ULiege; Englebert, Jérôme ULiege

in International Journal of Dream Research (2018), 11(1), 46-53

The aim of the current study was to provide a French validation of the MADRE questionnaire (Schredl, Berres, Klingauf, Schelhaas & Göritz, 2014) and to further examine demographic factors that may affect ... [more ▼]

The aim of the current study was to provide a French validation of the MADRE questionnaire (Schredl, Berres, Klingauf, Schelhaas & Göritz, 2014) and to further examine demographic factors that may affect dream-related experiences (Schredl, Berres, Klingauf, Schelhaas & Göritz, 2014). The participants were 357 Belgians aged from 18 to 81 years. Despite some differences caused by the sample features, the results obtained with the French version of the MADRE questionnaire indicated a lot of similarities with the German original version. However, all variables did not reach satisfying retest reliability. The findings regarding the French version of the MADRE questionnaire are encouraging but a replication with a shorter test/retest interval and a more representative sample is needed. [less ▲]

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See detailFace description abilities predict line-up performance
Vanootighem, Valentine ULiege; Brédart, Serge ULiege; Dehon, Hedwige ULiege

Poster (2017, August 31)

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See detailHallucinations in Healthy Older Adults: An Overview of the Literature and Perspectives for Future Research
Badcock, Johanna; Dehon, Hedwige ULiege; Laroi, Frank ULiege

in Frontiers in Psychology (2017)

Studies suggest a substantial minority of healthy older adults have hallucinatory experiences, in line with existing evidence on hallucinations in other age groups, though it is still unclear if ... [more ▼]

Studies suggest a substantial minority of healthy older adults have hallucinatory experiences, in line with existing evidence on hallucinations in other age groups, though it is still unclear if hallucination prevalence increases or declines with age in older cohorts. Stigma attached to both hallucinations and ageing leads to considerable underreporting of these experiences in healthy older adults and may negatively bias how professionals, family members, and the public respond. Why and when hallucinations in healthy older adults remit, persist, or progress to other clinical disorders remains poorly understood. Current evidence points to a range of factors associated with hallucinations in older adults including decline in sensory or cognitive functioning, poor sleep, and psychosocial stressors (e.g., social isolation, loneliness, and bereavement), highlighting the need for accurate assessment and tailored interventions. [less ▲]

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See detailEmotion, faux souvenirs et recollection illusoire
Dehon, Hedwige ULiege

Conference (2017, May 19)

De nombreuses études ont démontré que la nature émotionnelle d’un évènement améliore habituellement sa mémorisation et sa rétention. L’objectif de cette recherche était d’examiner dans quelle mesure le ... [more ▼]

De nombreuses études ont démontré que la nature émotionnelle d’un évènement améliore habituellement sa mémorisation et sa rétention. L’objectif de cette recherche était d’examiner dans quelle mesure le caractère émotionnel d’informations à mémoriser pouvait influencer la performance d’individus dans une tâche d’induction de faux souvenirs en laboratoire. Pour ce faire, 108 adultes ont mémorisé des listes d’associés sémantiques (tous positifs, tous négatifs, ou tous neutres) convergeant vers un mot-cible qui n’était jamais présenté (i.e., mariage, guerre ou informatique) en vue d’un test de reconnaissance ultérieur. Certains participants devaient également soit attribuer un degré de certitude à leurs réponses (groupe 1), soit un jugement de recollection ou de familiarité (groupe 2), soit évaluer les détails accompagnant leurs souvenirs à l’aide d’un questionnaire (groupe 3). Quel que soit le groupe, la valence émotionnelle n’avait pas d’incidence sur la reconnaissance des mots réellement présentés ni sur les degrés de certitude et autres mesures de recollection subjective. Par contre, les taux de fausses reconnaissances des mots-cibles pour les listes positives et négatives étaient semblables, mais supérieurs à ceux des listes neutres. De plus, à l’exception de la mesure de certitude qui ne variait pas selon le type de liste, les mesures de recollection subjective étaient systématiquement plus importantes pour les fausses reconnaissances des mots-cibles induites par les listes d’associés négatifs que par les listes neutres et positives. Ces données soutiennent l’idée que les faux souvenirs sont le produit d’un fonctionnement mnésique normal et qu’ils pourraient avoir une valeur adaptative pour l’être humain. [less ▲]

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See detailTraits psychopathiques dans une population infra-clinique et traitement émotionnel
Englebert, Jérôme ULiege; Bral, Laura; Dehon, Hedwige ULiege et al

Poster (2017, April 19)

L’intérêt pour la psychopathie infra-clinique n’est pas neuf. Toutefois, les études sur le sujet sont encore peu nombreuses. Notre recherche a consisté à mettre à l’épreuve deux hypothèses. La première ... [more ▼]

L’intérêt pour la psychopathie infra-clinique n’est pas neuf. Toutefois, les études sur le sujet sont encore peu nombreuses. Notre recherche a consisté à mettre à l’épreuve deux hypothèses. La première, concerne la présence de « traits psychopathiques » dans la population tout-venant et la seconde tend à évaluer dans quelle mesure la présence de ces traits influence le traitement émotionnel. Pour tester ces hypothèses, nous avons créé une version « online » du SRP-III (Self Report Psychopathy). Aux soixante-quatre items initialement présents dans cette échelle nous avons ajouté dix-sept items afin d’être en mesure d’également coter la PCL-R (Psychopathy Check List- Revised). Deux groupes de chacun treize participants ont été créés sur base de leur score au SRP-III (un groupe « faibles caractéristiques psychopathique » et un groupe « fortes caractéristiques psychopathiques »). La seconde partie de l’étude consistait en une entrevue durant laquelle nous avons procédé à des mises en situation d’induction émotionnelle. Pour mesurer l’influence de cette induction, trois tâches cognitives étaient administrées aux sujets des deux groupes. La première hypothèse s’est vue confirmée à travers la récolte des données du questionnaire en ligne. Quant à la seconde hypothèse, les résultats statistiques n’indiquent aucune différence significative entre les groupes en ce qui concerne leur score aux tâches cognitives. Il est donc suggéré que la présence de traits psychopathiques n’influence pas le traitement émotionnel. Cette recherche confirme la présence de la psychopathie dans la population tout-venant et semble infirmer, parmi cette population, l’hypothèse d’un déficit du traitement émotionnel. [less ▲]

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See detailFalse memory susceptibility in coma survivors with and without a near-death experience
Martial, Charlotte ULiege; Charland-Verville, Vanessa ULiege; Dehon, Hedwige ULiege et al

in Psychological Research (2017)

It has been postulated that memories of neardeath experiences (NDEs) could be (at least in part) reconstructions based on experiencers’ (NDErs) previous knowledge and could be built as a result of the ... [more ▼]

It has been postulated that memories of neardeath experiences (NDEs) could be (at least in part) reconstructions based on experiencers’ (NDErs) previous knowledge and could be built as a result of the individual’s attempt to interpret the confusing experience. From the point of view of the experiencer, NDE memories are perceived as being unrivalled memories due to its associated rich phenomenology. However, the scientific literature devoted to the cognitive functioning of NDErs in general, and their memory performance in particular, is rather limited. This study examined NDErs’ susceptibility to false memories using the Deese–Roediger–McDermott (DRM) paradigm. We included 20 NDErs who reported having had their experience in the context of a life-threatening event (Greyson NDE scale total score ≥7/32) and 20 volunteers (matched for age, gender, education level, and time since brain insult) who reported a life-threatening event but without a NDE. Both groups were presented with DRM lists for a recall task during which they were asked to assign “Remember/Know/Guess” judgements to any recalled response. In addition, they were later asked to complete a post-recall test designed to obtain estimates of activation and monitoring of critical lures. Results demonstrated that NDErs and volunteers were equally likely to produce false memories, but that NDErs recalled them more frequently associated with compelling illusory recollection. Of particular interest, analyses of activation and monitoring estimates suggest that NDErs and volunteers groups were equally likely to think of critical lures, but source monitoring was less successful in NDErs compared to volunteers. [less ▲]

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See detailThe verbal overshadowing effect in children and adults is unrelated to the specific content of descriptions
Vanootighem, Valentine ULiege; Brédart, Serge ULiege; Dehon, Hedwige ULiege

Poster (2016, July 21)

Verbal descriptions of unfamiliar faces have been found to impair later identification of these faces in children and adults, a phenomenon known as the “verbal overshadowing effect” (VOE, Schooler and ... [more ▼]

Verbal descriptions of unfamiliar faces have been found to impair later identification of these faces in children and adults, a phenomenon known as the “verbal overshadowing effect” (VOE, Schooler and Engstler-Schooler, 1990). The present study thoroughly examined the person descriptive abilities of 7–8, 10–11, and 13–14-year-old children and adults and their influence on later identification performance. Our aim was to specifically assess the prediction of the “content” account suggesting that a verbal overshadowing arises because participants generate an inadequate verbal description and later rely upon it during retrieval. Results showed a verbal overshadowing effect in all age groups but neither accuracy, length nor content of descriptions were found to be associated with identification accuracy. [less ▲]

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See detailComparison of individuals’ susceptibility to false memory induced by both DRM and misinformation paradigms involving emotional material
Martial, Charlotte ULiege; Dehon, Hedwige ULiege

Poster (2015, September)

False memories induced by the DRM procedure (“Deese, Roediger and McDermott”; Deese, 1959; Roediger & McDermott, 1995) or the misinformation procedure (in which a person’s recollection of a witnessed ... [more ▼]

False memories induced by the DRM procedure (“Deese, Roediger and McDermott”; Deese, 1959; Roediger & McDermott, 1995) or the misinformation procedure (in which a person’s recollection of a witnessed event is altered after exposure to misinformation about this event; Loftus et al., 1978) are due to errors in source monitoring processes (e.g., Johnson et al., 1993) and one might expect the correlation between these false memories quite positive. However, the few laboratory studies comparing the DRM paradigm and the misinformation paradigm show small (Zhu et al., 2013) or no correlation (Ost et al., 2013) between the false memories elicited by these procedures. However, these studies vary in terms of methodological details. For instance, false memories from the misinformation procedure involved emotional content while those from the DRM procedure only included neutral materials. This study investigated the relationship between false memories induced by two different paradigms (a DRM task and a misinformation procedure) both involving an emotional material. Participants (N = 154) completed an emotional variant of the DRM (neutral, positive and negative lists) and the misinformation (neutral, positive and negative images) procedures and their performances on both tasks were compared. Although both paradigms reliably induced false memories in participants, our analyses revealed only a marginally weak positive correlation (r = .147, p = .051) between misinformation and DRM false memories using emotional variants. These results support the idea that DRM and misinformation false memories are underpinned by (at least in part) different mechanisms and that the previous mixed results were not due to the specific content of the DRM or the misinformation task used. [less ▲]

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See detailPsychopathy and emotions: would emotional distancing make more efficient in cognitive tasks?
Grandjean, Sylvie; Dehon, Hedwige ULiege; Blavier, Adelaïde ULiege et al

Poster (2015, May 28)

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See detailComparison of individuals’ susceptibility to false memory induced by both DRM and misinformation paradigms involving emotional material
Martial, Charlotte ULiege; Dehon, Hedwige ULiege

Poster (2015, May)

False memories induced by the DRM procedure (“Deese, Roediger and McDermott”; Deese, 1959; Roediger & McDermott, 1995) or the misinformation procedure (in which a person’s recollection of a witnessed ... [more ▼]

False memories induced by the DRM procedure (“Deese, Roediger and McDermott”; Deese, 1959; Roediger & McDermott, 1995) or the misinformation procedure (in which a person’s recollection of a witnessed event is altered after exposure to misinformation about this event; Loftus et al., 1978) are due to errors in source monitoring processes (e.g., Johnson et al., 1993) and one might expect the correlation between these false memories quite positive. However, the few laboratory studies comparing the DRM paradigm and the misinformation paradigm show small (Zhu et al., 2013) or no correlation (Ost et al., 2013) between the false memories elicited by these procedures but these studies vary in terms of methodological details. For instance, false memories from the misinformation procedure involved emotional content while those from the DRM procedure only included neutral materials. This study investigated the relationship between false memories induced by two different paradigms (a DRM task and a misinformation procedure) both involving an emotional material. Participants (N = 154) completed an emotional variant of the DRM (neutral, positive and negative lists) and the misinformation (neutral, positive and negative images) procedures and their performances on both tasks were compared. Although both paradigms reliably induced false memories in participants, our analyses revealed only a marginally weak positive correlation (r = .147, p = .051) between misinformation and DRM false memories using emotional variants. These results support the idea that DRM and misinformation false memories are underpinned by (at least in part) different mechanisms and that the previous mixed results were not due to the specific content of the DRM or the misinformation task used. [less ▲]

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See detailLa mémoire manipulée - les faux souvenirs et les faux aveux sont-ils possibles?
Dehon, Hedwige ULiege

Article for general public (2015)

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