High Alexithymia Scorers Research Articles

Alexithymia disrupts the beneficial influence of arousal on attention: Evidence from the attentional blink.

Alexithymia is a multifaceted personality construct that encompasses difficulties in identifying and describing feelings along with an externally oriented cognitive style. The influence of alexithymia and arousal on the cognitive processing of emotion is now widely demonstrated. To test the joint influence of alexithymia and arousal on attentional processes, 55 participants completed 2 blocks of attentional blink trials, one after a baseline (relaxed) session and the other after a cycling (aroused) session. The attentional blink task consists in presenting a neutral first to-be-detected target and second targets (T2) that were neutral (e.g., echo), low-arousal (i.e., emptiness), or high-arousal (e.g., murder) words and presented 213 ms after the first target. The results show that alexithymia interacted with arousal (cycling vs. baseline) and type T2, so that arousal was beneficial to detect T2 only for low-alexithymia scorers. The findings are discussed within the framework showing a decoupling between physiological arousal and subjective experience in high-alexithymia scorers. (PsycINFO Database Record (c) 2019 APA, all rights reserved).

Alexithymia modulates the experience of the rubber hand illusion.

Alexithymia is associated with lower awareness of emotional and non-emotional internal bodily signals. However, evidence suggesting that alexithymia modulates body awareness at an external level is scarce. This study aimed to investigate whether alexithymia is associated with disrupted multisensory integration by using the rubber hand illusion task. Fifty healthy individuals completed the Toronto Alexithymia Scale and underwent the rubber hand illusion measure. In this measure, one watches a rubber hand being stroked synchronously or asynchronously with one’s own hand, which is hidden from view. Compared to the asynchronous stimulation, the synchronous stimulation results in the illusion that the rubber hand and the participant’s hand are closer together than they really are and that the rubber hand belongs to them. Results revealed that higher levels of alexithymia are associated with a lower ownership illusion over the rubber hand. In conclusion, our findings demonstrate that high alexithymia scorers integrate two simultaneous sensory and proprioceptive events into a single experience (lower multisensory integration) to a lesser extent than low alexithymia scorers. Higher susceptibility to the illusion in high alexithymia scorers may indicate that alexithymia is associated with an abnormal focus of one’s own body.

Joint effect of alexithymia and mood on the categorization of nonverbal emotional vocalizations

The role of stable factors, such as alexithymia (i.e., difficulties identifying and expressing feelings, externally oriented cognitive style), or temporary factors, such as affective states (mood), on emotion perception has been widely investigated in the literature. However, little is known about the separate or joint effect of the alexithymia level and affective states (positive affectivity, negative affectivity) on the recognition of nonverbal emotional vocalizations (NEV) (e.g., laughs, cries, or sighs). In this study, participants had to categorize NEV communicating 10 emotions by selecting the correct verbal emotional label. Results show that the level of alexithymia is negatively correlated to the capacity to accurately categorize negative vocalizations, and more particularly sad NEV. On the other hand, negative affectivity appeared negatively correlated with the ability to accurately categorize NEV in general, and negative vocalizations in particular. After splitting the results by the alexithymia level (high vs. low scorers), significant associations between mood and accuracy rates were found in the group of high alexithymia scorers only. These findings support the idea that alexithymic features act across sensory modalities and suggest a mood-interference effect that would be stronger in those individuals.

Amplification of attentional blink by distress-related facial expressions: relationships with alexithymia and affectivity.

The present studies aimed to analyse the modulatory effect of distressing facial expressions on attention processing. The attentional blink (AB) paradigm is one of the most widely used paradigms for studying temporal attention, and is increasingly applied to study the temporal dynamics of emotion processing. The aims of this study were to investigate how identifying fear and pain facial expressions (Study 1) and fear and anger facial expressions (Study 2) would influence the detection of subsequent stimuli presented within short time intervals, and to assess the moderating influence of alexithymia and affectivity on this effect. It has been suggested that high alexithymia scorers need more attentional resources to process distressing facial expressions and that negative affectivity increases the AB. We showed that fear, anger and pain produced an AB and that alexithymia moderated it such that difficulty in describing feelings (Study 1) and externally oriented thinking (Study 2) were associated with higher interference after the processing of fear and anger at short time presentations. These studies provide evidence that distressing facial expressions modulate the attentional processing at short time intervals and that alexithymia influences the early attentional processing of fear and anger expressions. Controlling for state affect did not change these conclusions.

Alexithymia is associated with an augmenter profile, but not only: Evidence for anticipation to arousing music

It has been suggested that high alexithymia scorers have an 'augmenter' profile which amplifies their physiological and subjective responses to highly arousing stimuli. The aim of this study was to test this theory using several physiological measures. Participants listened to musical excerpts either in a 'weak-to-strong' or a 'strong-to-weak' order of arousing levels of stimuli. The results show that alexithymia was associated with an augmenter profile for subjective reports for the most arousing stimulus and with stronger skin conductance level responses in the 'strong-to-weak' order. These results partially support the augmenter profile and reveal that alexithymia may be associated with higher anticipation for the most arousing excerpt.

Personality-dependent effects of oxytocin: Greater social benefits for high alexithymia scorers

Originally known for its role in labor and lactation, oxytocin (OT) has recently been shown to facilitate social behaviour by improving socio-emotional abilities. However, whether OT is equally beneficial to all people, or whether is it particularly beneficial to less emotionally/socially competent (i.e., high alexithymia) individuals it is not yet known. We investigated the effects of OT on individuals of varying socio-emotional ability by randomly assigning sixty male students to receive either oxytocin (OT) or a placebo (PL), and had them perform the Reading the Mind in the Eyes test (RMET). Results showed that whereas the performance of lower alexithymia individuals was equally good in both OT and PL conditions, the performance of higher alexithymia people was better under OT than PL. These results suggest that the effects of OT are not only context-dependent—as recently shown—but also personality dependent. They also provide new insights into the remediation of socio-emotional deficits.

The influence of Alexithymia and music on the Incidental Memory for Emotion Words

Alexithymia is a multifaceted personality construct which encompasses difficulties in identifying and expressing feelings along with an externally oriented cognitive style. We investigated whether congruent vs. incongruent emotional musical priming (happy and angry music) during encoding would moderate the effects of alexithymia on recognition rates. We found that high alexithymia scorers recognized fewer joy and anger words than low scorers. Angry music decreased recognition rates in high alexithymia scorers compared to low alexithymia scorers. The congruency and incongruency effects between music and words depended on alexithymia level. The anger deficit in high alexithymia scorers and the possible support provided by happiness cues are discussed. Copyright © 2010 John Wiley & Sons, Ltd.

Alexithymia factors and memory performances for neutral and emotional words

Alexithymia is a multifaceted personality construct, which includes difficulties in identifying and expressing feelings and an externally-oriented cognitive style. We investigated the effects of alexithymia and its subscales on recall and recognition rates for neutral, joy, disgust and anger words. We found that the alexithymia-factor difficulties identifying feelings was negatively associated with memory performance for emotion words whereas a positive association was found between the alexithymia factor externally-oriented cognitive style and recognition rates for all words (emotional and neutral). The deficit for difficulties identifying feelings was particularly strong for remember responses. Such a deficit in the ability to consciously recognize emotional concepts could be related to the observed difficulties in regulating intense feelings found in high alexithymia scorers.

Categorical perception of anger is disrupted in alexithymia: Evidence from a visual ERP study

High and low alexithymia scorers were confronted with a modified visual oddball task that allowed the study of categorical perception of emotional expressions on faces. Participants had to quickly detect a deviant (rare) morphed face that shared or did not share the same emotional expression as the frequent one. Expected categorical perception effects, which were also neurophysiologically indexed, showed that rare stimuli were detected faster if they depicted a different emotional expression compared to rare stimuli depicting the same emotional expression than the frequent one. Even if no differences were observed at a behavioural level, high alexithymia scorers evidenced overall delayed neurophysiological responses in components related to the attentional processing of rare emotional faces. Moreover, the categorical perception effects for event-related components associated with the attentional processing were smaller in high alexithymia scorers and were even absent for anger. These results show that high alexithymia scorers present discrimination delays that are already observed at the attentional level.

Alexithymia and the automatic processing of affective information: Evidence from the affective priming paradigm

In Study 1, we examined the moderating impact of alexithymia (i.e., a difficulty identifying and describing feelings to other people and an externally oriented cognitive style) on the automatic processing of affective information. The affective priming paradigm was used, and lower priming effects for high alexithymia scorers were observed when congruent (incongruent) pairs involving nonverbal primes (angry face) and verbal target were presented. The results held after controlling for participants' negative affectivity. The same effects were replicated in Studies 2 and 3, with trait anxiety and depression entered as additional covariates. In Study 3, no moderating impact of alexithymia was found for verbal-facial pairs suggesting that the results cannot be merely explained in terms of transcoding limitations for high alexithymia scorers. Overall, the present results suggest that alexithymia could be related to a difficulty in processing and automatically using high arousal emotional information to respond to concomittant behavioural demands.

Alexithymia and deficits in the cognitive processing and regulation of emotional states

Alexithymia is a multidimensional personality construct encompassing three facets: difficulty identifying feelings, difficulty describing feelings, a reduced capacity to engage in fantasy and other imaginal activities and an externally-oriented cognitive style. In the present talk, I would like to present data supporting the view that the alexithymia facets reflect a deficit in the cognitive processing and regulation of emotional states. In one study, we explored the relations between alexithymia and emotional responding across different contexts: (1) initial exposure to an emotion-evoking movie, (2) second exposure to that stimulus, (3) reports of rumination and social sharing, and (4) describing their emotional response (verbal re-evocation). The main result was that facets of the alexithymia construct were associated at the initial exposure with lower emotional responses at the cognitive/experiential level, but with higher emotional responses at the physiological level as measured by heart rate suggesting some dissociations between components of emotional responding. In more recent studies, we explored the implicit abilities of high alexithymia scorers to process affectively congruent vs. incongruent prime-target pairs, using the affective priming paradigm. I will present three studies that consistently showed lower facilitation effects for higher alexithymia scorers when congruent pairs involved the presentation of an angry face followed by a negative verbal target. These results suggest that alexithymia could be related to a difficulty to process and automatically use high arousal emotional information to respond to concomittant behavioural demands.

Alexithymia, defensiveness and cardiovascular reactivity to stress

This article attempts to further our understanding of alexithymia by testing two conceptual questions about the construct: (a) Is alexithymia characterized by reduced autonomic activity? and (b) Can it be clearly distinguished from defensiveness? Eighty healthy university students completed a battery of personality scales including the Toronto Alexithymia Scale, measures of self-deception and impression management, depression, and anger-in. They also participated in three lab stress tasks: isometric handgrip; mental arithmetic; and a negative affect provocation task. Blood pressure and heart rate were monitored throughout the lab procedure. Analyses were conducted with tercile groups of low, medium, and high alexithymia scorers. The “high alexithymia” tercile showed smaller heart rate responses to the stress tasks and more anger-in behavior. Blood pressure responses did not differentiate the low/medium/high alexithymia subgroups. Alexithymia scores were unrelated to defensiveness, that is, there was no relationship between alexithmia and impression management or self-deception, and alexithymia was unrelated to depression. We conclude that students defined as “high alexithymia” on the Toronto Alexithymia Scale are not self-deceptive nor do they try to leave a particular impression; they tend to be somewhat hypoaroused autonomically, and they report as many psychological distress symptoms as do subjects with lower TAS scores.