TY  - JOUR
A1  - Ventura-Bort, Carlos
A1  - Dolcos, Florin
A1  - Wendt, Julia
A1  - Wirkner, Janine
A1  - Hamm, Alfons O.
A1  - Weymar, Mathias
T1  - Item and source memory for emotional associates is mediated by different retrieval processes
JF  - Neuropsychologia : an international journal in behavioural and cognitive neuroscience
N2  - Recent event-related potential (ERP) data showed that neutral objects encoded in emotional background pictures were better remembered than objects encoded in neutral contexts, when recognition memory was tested one week later. In the present study, we investigated whether this long-term memory advantage for items is also associated with correct memory for contextual source details. Furthermore, we were interested in the possibly dissociable contribution of familiarity and recollection processes (using a Remember/Know procedure). The results revealed that item memory performance was mainly driven by the subjective experience of familiarity, irrespective of whether the objects were previously encoded in emotional or neutral contexts. Correct source memory for the associated background picture, however, was driven by recollection and enhanced when the content was emotional. In ERPs, correctly recognized old objects evoked frontal ERP Old/New effects (300-500 ms), irrespective of context category. As in our previous study (Ventura-Bort et al., 2016b), retrieval for objects from emotional contexts was associated with larger parietal Old/New differences (600-800 ms), indicating stronger involvement of recollection. Thus, the results suggest a stronger contribution of recollection-based retrieval to item and contextual background source memory for neutral information associated with an emotional event.
KW  - event-related potentials
KW  - emotion
KW  - source memory
KW  - remember/know
KW  - old/new
KW  - effect
Y1  - 2017
U6  - https://doi.org/10.1016/j.neuropsychologia.2017.12.015
SN  - 0028-3932
SN  - 1873-3514
VL  - 145
PB  - Elsevier
CY  - Oxford
ER  - 
TY  - JOUR
A1  - Lischke, Alexander
A1  - Junge, Martin
A1  - Hamm, Alfons O.
A1  - Weymar, Mathias
T1  - Enhanced processing of untrustworthiness in natural faces with neutral expressions
JF  - Emotion : a new journal from the American Psychological Association
N2  - During social interactions, individuals rapidly and automatically judge others’ trustworthiness on the basis of subtle facial cues. To investigate the behavioral and neural correlates of these judgments, we conducted 2 studies: 1 study for the construction and evaluation of a set of natural faces differing in trustworthiness (Study 1: n = 30) and another study for the investigation of event-related potentials (ERPs) in response to this set of natural faces (Study 2: n = 30). Participants of both studies provided highly reliable and nearly identical trustworthiness ratings for the selected faces, supporting the notion that the discrimination of trustworthy and untrustworthy faces depends on distinct facial cues. These cues appear to be processed in an automatic and bottom-up-driven fashion because the free viewing of these faces was sufficient to elicit trustworthiness-related differences in late positive potentials (LPPs) as indicated by larger amplitudes to untrustworthy as compared with trustworthy faces. Taken together, these findings suggest that natural faces contain distinct cues that are automatically and rapidly processed to facilitate the discrimination of untrustworthy and trustworthy faces across various contexts, presumably by enhancing the elaborative processing of untrustworthy as compared with trustworthy faces. (
KW  - face perception
KW  - emotion
KW  - trustworthiness
KW  - event-related potentials
KW  - amygdala
Y1  - 2018
U6  - https://doi.org/10.1037/emo0000318
SN  - 1528-3542
SN  - 1931-1516
VL  - 18
IS  - 2
SP  - 181
EP  - 189
PB  - American Psychological Association
CY  - Washington
ER  -