The use of crowdsourcing platforms such as Amazon's Mechanical Turk (MTurk) for data collection in the behavioral sciences has increased substantially in the past several years due in large part to (a) the ability to recruit large samples, (b) the inexpensiveness of data collection, (c) the speed of data collection, and (d) evidence that the data collected are, for the most part, of equal or better quality to that collected in undergraduate research pools. In this review, we first evaluate the strengths and potential limitations of this approach to data collection. Second, we examine how MTurk has been used to date in personality disorder (PD) research and compare the characteristics of such research to PD research conducted in other settings. Third, we compare PD trait data from the Section III trait model of the DSM-5 collected via MTurk to data collected using undergraduate and clinical samples with regard to internal consistency, mean-level differences, and factor structure. Overall, we conclude that platforms such as MTurk have much to offer PD researchers, especially for certain kinds of research (e.g., where large samples are required and there is a need for iterative sampling). Whether MTurk itself remains the predominant model of such platforms is unclear, however, and will largely depend on decisions related to cost effectiveness and the development of alternatives that offer even greater flexibility. (PsycINFO Database Record

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There is broad consensus that there are at least two different dimensions of narcissism: vulnerable and grandiose. In this study, the authors use a new trifurcated, three-factor model of narcissism to examine relations between aspects of narcissism and an array of clinically relevant criteria related to psychopathology, the self, authenticity, and well-being. Neurotic and antagonistic aspects of narcissism emerged as the most clinically relevant dimensions of narcissism, bearing relations with outcomes relating to interpersonal guilt, insecure attachment styles, cognitive distortions, maladaptive defense mechanisms, experiential avoidance, impostor syndrome, weak sense of self, inauthenticity, low self-esteem, and reduced psychological well-being. Grandiose narcissism was not correlated with most forms of psychopathology and was even positively associated with life satisfaction. Nevertheless, a surprising link was found between grandiose narcissism and multiple indicators of inauthenticity. Implications for the appropriate conceptualization, assessment, and treatment of pathological narcissism are discussed.

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We present a systematic study of the absorption, heating behavior, and microstructure evolution of porous copper powder metal compacts subjected to 2.45 GHz microwave radiation and explain our observations using known physical mechanisms. Using a single-mode microwave system, we place the compacts in pure electric (E) or magnetic (H) fields and compare the heating trends. We also investigate the effect of particle size on the same. The observed trends and the differences between E- and H-field heating are reflected in the dramatic changes in the conductivity, permittivity, and permeability of the samples. These property changes are effected by the microstructure evolution during heating in the two types of fields. We also find that the observed dependence of the initial microwave heating on particle size is suggestive of single-particle behavior.