Emotional face expressions and group membership: Does affective mismatch induce conflict?

When asked to judge or react to a facial emotional display of a person, people do not only take the emotion into account, but also other socially important features of the face, such as, for example, ethnicity (Kozlik & Fischer, 2020; Paulus & Wentura, 2014). Importantly, the emotion-related and nonemotion-related features are seemingly not (or not always) processed in a simple, additive manner, but are-in a more functional manner-integrated to provide an "amalgamated signal" on which individuals base their judgment and responses. Whereas Paulus and Wentura (2014) put forward a social-message account of this amalgamated signal, Kozlik and Fischer (2020) recently proposed a processing-conflict explanation. The empirical evidence regarding this issue is, however, mixed. In three experiments, we aimed at replicating and extending Kozlik and Fischer's central experiment to gain further insight into the validity of the social-message versus the processing-conflict account. However, we failed to replicate their findings. The implications of the new evidence for the two accounts are discussed. (PsycInfo Database Record (c) 2023 APA, all rights reserved).

Visual processing of food stimuli: The impact of working memory load and color.

Our environment is surrounded by appetizing food stimuli that contribute to an increase in health problems such as obesity and overweight. Understanding the cognitive factors underlying the processing of food stimuli can play an important role in health interventions. Recent studies showed that high-calorie food stimuli impair working memory (WM) task performance, and some individuals, such as restrained eaters, are more susceptible to this WM performance decrement. The present study investigated the effect of low and high WM load on the processing of food stimuli in restrained and unrestrained eaters. Using an n-back task, identical food (low and high calorie) and non-food (object) stimuli were presented in colored (Experiment 1A) or in grayscale (Experiment 1B) versions. Performance was assessed by reaction time (RT), d-prime, and response bias C variables. Results revealed differences in the different WM load conditions. While no effects were observed in the low load, higher WM load impaired task performance. Processing the food stimuli, compared to objects, led to longer RTs and decreased task performance, indicated by d prime and response bias, only when the stimuli were presented in color but not in grayscale. Though no difference was observed in restrained and unrestrained eaters, the role of WM load on the visual processing of the food stimuli remains to be further examined.

Involuntary evaluation of others' emotional expressions depends on the expresser's group membership. Further evidence for the social message account from the extrinsic affective Simon task.

The social message account (SMA) hypothesizes that the evaluation of emotional facial expressions depends on the ethnicity of the expressers. For example, according to SMA, a happy face of a member of a prejudiced ethnicity is immediately interpreted as potentially malevolent. Evidence for this approach was found initially in evaluative priming (EP) and approach-avoidance tasks (AA) by showing an emotion × ethnicity interaction on positivity scores (EP) and approach scores (AA), respectively. Recently, attempts to replicate the EP results failed. Due to the inconclusive EP results, it was important to examine the influence of ethnicity on processing of emotional expression with another task testing involuntary evaluations. The extrinsic affective Simon task was used with stimuli varying on emotion (happy vs. fear) and ethnicity (White-Caucasian vs. Middle-Eastern men). This task was chosen because in contrast to EP (where faces are presented as task-irrelevant primes) faces are task-relevant. Experiment 1 yielded an emotion × ethnicity interaction with regard to positivity scores that fit SMA predictions. The results are also important in challenging a recent theoretical alternative to SMA, namely the processing conflict account. A generalization of the emotion × ethnicity pattern to learned arbitrary in- and out-groups (Experiment 2) failed, suggesting that involuntary processing of (task-irrelevant) group status depends on perceptual features.

Exploring the Space-Calorie Association: Preliminary Evidence from Reaction Time Performance.

The present study was designed to investigate the representation of calorie levels in space. Previously an association between numerical magnitude and space has been established, namely, the Spatial Numerical Association of Response Codes (SNARC) effect. The spatial-numerical association reveals representation of smaller and larger numbers by the left and right sides, respectively. In addition, previous studies showed that spatial arrangement of foods in space affects the food selection behavior. In three experiments, the presence of an association between calorie magnitude and space was tested to understand how it could potentially affect food selection behavior. Reaction times were recorded to investigate the speed of information processing. In Experiment 1, locations of low and high calorie food stimuli were (in)congruent in terms of the space-calorie association. In Experiment 2, endogenous spatial cues were used to bias attention to investigate if this bias would lead to formation of the space-calorie association. Finally, Experiment 3 investigated whether green and red colors evoke approach or avoidance behavior and prevent formation of the space-calorie association. In all experiments, results revealed lack of an association between space and calorie, that is, presenting low/high calorie items on the left/right hemispace, respectively, did not modulate the processing speed.

Compatibility Between Physical Stimulus Size - Spatial Position and False Recognitions.

Magnitude processing is of great interest to researchers because it requires integration of quantity related information in memory regardless of whether the focus is numerical or non-numerical magnitudes. The previous work has suggested an interplay between pre-existing semantic information about number-space relationship in processes of encoding and recall. Investigation of the compatibility between physical stimulus size - spatial position and false recognition may provide valuable information about the cognitive representation of non-numerical magnitudes. Therefore, we applied a false memory procedure to a series of non-numerical stimulus pairs. Three versions of the pairs were used: big-right (a big character on the right/a small character on the left), big-left (a big character on the left/a small character on the right), and equal-sized (an equal sized character on each side). In the first phase, participants (N = 100) received 27 pairs, with nine pairs from each experimental condition. In the second phase, nine pairs from each of three stimulus categories were presented: (1) original pairs that were presented in the first phase, (2) mirrored pairs that were horizontally flipped versions of the pairs presented in the first phase, and (3) novel pairs that had not been presented before. The participants were instructed to press "YES" for the pairs that they remembered seeing before and to press "NO" for the pairs that they did not remember from the first phase. The results indicated that the participants made more false-alarm responses by responding "yes" to the pairs with the bigger one on the right. Moreover, they responded to the previously seen figures with the big one on the right faster compared to their distracting counterparts. The study provided evidence for the relationship between stimulus physical size and how they processed spatially by employing a false memory procedure. We offered a size-space compatibility account based on the congruency between the short- and long-term associations which produce local compatibilities. Accordingly, the compatible stimuli in the learning phase might be responsible for the interference, reflecting a possible short-term interference effect on congruency between the short- and long-term associations. Clearly, future research is required to test this speculative position.

A fast and adaptive automated disease diagnosis method with an innovative neural network model.

Automatic disease diagnosis systems have been used for many years. While these systems are constructed, the data used needs to be classified appropriately. For this purpose, a variety of methods have been proposed in the literature so far. As distinct from the ones in the literature, in this study, a general-purpose, fast and adaptive disease diagnosis system is developed. This newly proposed method is based on Learning Vector Quantization (LVQ) artificial neural networks which are powerful classification algorithms. In this study, the classification ability of LVQ networks is developed by embedding a reinforcement mechanism into the LVQ network in order to increase the success rate of the disease diagnosis method and reduce the decision time. The parameters of the reinforcement learning mechanism are updated in an adaptive way in the network. Thus, the loss of time due to incorrect selection of the parameters and decrement in the success rate are avoided. After the development process mentioned, the newly proposed classification technique is named "Adaptive LVQ with Reinforcement Mechanism (ALVQ-RM)". The method proposed handles data with missing values. To prove that this method did not offer a special solution for a particular disease, because of its adaptive structure, it is used both for diagnosis of breast cancer, and for diagnosis of thyroid disorders, and a correct diagnosis rate after replacing missing values using median method over 99.5% is acquired in average for both diseases. In addition, the success rate of determination of the parameters of the proposed "LVQ with Reinforcement Mechanism (LVQ-RM)" classifier, and how this determination affected the required number of iterations for acquiring that success rate are discussed with comparison to the other studies.