An adaptation reference-point-based multiobjective evolutionary algorithm

The file attached to this record is the author's final peer reviewed version. The Publisher's final version can be found by following the DOI link.It is well known that maintaining a good balance between convergence and diversity is crucial to the performance of multiobjective optimization algorithms (MOEAs). However, the Pareto front (PF) of multiobjective optimization problems (MOPs) affects the performance of MOEAs, especially reference point-based ones. This paper proposes a reference-point-based adaptive method to study the PF of MOPs according to the candidate solutions of the population. In addition, the proportion and angle function presented selects elites during environmental selection. Compared with five state-of-the-art MOEAs, the proposed algorithm shows highly competitive effectiveness on MOPs with six complex characteristics

Skill Spanning in the Online Labor Market: A Double-Edged Sword?

Freelancers in online labor markets often display many skills in their profiles to increase their chances of being hired. However, such behavior may lead to the skills they display straddling multiple categories, that is, “skill spanning.” In this paper, we extend the concept of category spanning into online labor markets in the form of skill spanning and empirically examine (1) how freelancers’ skill spanning affects employers’ hiring decisions for two different types of jobs (low- and high-skill jobs, respectively), and (2) how freelancers’ skill matching moderates the effects of skill spanning on employers’ hiring decisions. Based on a unique dataset of 12,428 high-skill jobs and 19,875 low-skill jobs on a leading online labor platform, we find that freelancers’ skill spanning has different impacts on employers’ hiring decisions for these two job types. Specifically, for high-skill jobs, freelancers’ skill spanning reduces their likelihood of winning contracts; however, for low-skill jobs, freelancers’ skill spanning and their probabilities of winning contracts demonstrate an inverse U-shape relationship. Furthermore, freelancers’ skill matching can moderate the negative effects of skill spanning for high-skill jobs but not for low-skill jobs. Our findings provide guidelines for different stakeholders in online labor markets, including freelancers and platform owners

Spatial Stroop and spatial orienting: the role of onset versus offset cues

The present study investigated whether offset cues have the same attentional consequences in the spatial Stroop effect as onset cues. Experiments 1 and 2 compared the attentional effects of onset-offset cues versus offset cues on the spatial Stroop effect, whereas Experiment 3 compared the attentional effects of onset versus offset cues. Across these experiments, independent of cue type (onset-offset or onset vs. offset) and even at long stimulus-onset asynchrony, attentional cueing did not revert into inhibition of return and was modulated by spatial Stroop with greater cueing effects for incongruent arrow&#39;s direction and position. In addition, onset-offset or onset and offset cues produced comparable cueing effects in the location-direction congruent condition, and onset-offset or onset cues produced greater facilitation than offset cues in the incongruent condition. From a different perspective, peripheral cueing modulated the spatial Stroop effect in the same direction for onset-offset or onset and offset cues, although the reduction in spatial Stroop at cued locations was smaller with offset than with onset-offset or onset cues.</p