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https://www.readbyqxmd.com/read/28634154/improving-consensus-scoring-of-crowdsourced-data-using-the-rasch-model-development-and-refinement-of-a-diagnostic-instrument
#1
Christopher John Brady, Lucy Iluka Mudie, Xueyang Wang, Eliseo Guallar, David Steven Friedman
BACKGROUND: Diabetic retinopathy (DR) is a leading cause of vision loss in working age individuals worldwide. While screening is effective and cost effective, it remains underutilized, and novel methods are needed to increase detection of DR. This clinical validation study compared diagnostic gradings of retinal fundus photographs provided by volunteers on the Amazon Mechanical Turk (AMT) crowdsourcing marketplace with expert-provided gold-standard grading and explored whether determination of the consensus of crowdsourced classifications could be improved beyond a simple majority vote (MV) using regression methods...
June 20, 2017: Journal of Medical Internet Research
https://www.readbyqxmd.com/read/28633999/characteristics-of-a-mild-traumatic-brain-injury-sample-recruited-using-amazon-s-mechanical-turk
#2
John Bernstein, Matthew Calamia
BACKGROUND: Several barriers exist in the recruitment of individuals with a history of mild traumatic brain injury (mTBI). The current study is the first to examine whether crowdsourcing, which has been used in other clinical populations, is useful in the recruitment of those with mTBI. OBJECTIVE: To examine whether Amazon's Mechanical Turk (MTurk), an online crowdsourcing platform, is a useful tool in the recruitment of individuals with a history of mild traumatic brain injury (mTBI) and to examine the injury and psychological characteristics of individuals who report a history of mTBI...
June 17, 2017: PM & R: the Journal of Injury, Function, and Rehabilitation
https://www.readbyqxmd.com/read/28627926/using-crowdsourcing-to-examine-behavioral-economic-measures-of-alcohol-value-and-proportionate-alcohol-reinforcement
#3
Vanessa Morris, Michael Amlung, Brent A Kaplan, Derek D Reed, Tashia Petker, James MacKillop
Online crowdsourcing websites such as Amazon's Mechanical Turk (MTurk) are increasingly being used in addictions research. However, there is a relative paucity of such research examining the validity of administering behavioral economic alcohol-related measures, via an online crowdsourcing platform. This study sought to validate an alcohol purchase task (APT) for assessing demand and a questionnaire measure of proportionate alcohol reinforcement, using an online sample of participants recruited via MTurk. Participants (N = 865, 59% female) were recruited via MTurk to complete the APT, proportionate alcohol reinforcement questionnaire, Alcohol Use Disorders Identification Test (AUDIT), and demographics...
June 19, 2017: Experimental and Clinical Psychopharmacology
https://www.readbyqxmd.com/read/28623608/gambling-and-the-reasoned-action-model-predicting-past-behavior-intentions-and-future-behavior
#4
Ethan Dahl, Michael J Tagler, Zachary P Hohman
Gambling is a serious concern for society because it is highly addictive and is associated with a myriad of negative outcomes. The current study applied the Reasoned Action Model (RAM) to understand and predict gambling intentions and behavior. Although prior studies have taken a reasoned action approach to understand gambling, no prior study has fully applied the RAM or used the RAM to predict future gambling. Across two studies the RAM was used to predict intentions to gamble, past gambling behavior, and future gambling behavior...
June 16, 2017: Journal of Gambling Studies
https://www.readbyqxmd.com/read/28622030/age-of-initiation-and-internet-gaming-disorder-the-role-of-self-esteem
#5
Charlotte L Beard, Amie L Haas, Robert E Wickham, Vasileios Stavropoulos
The link between early initiation and problematic use has been observed for substance use disorders; however, this link has not been as clearly established for Internet gaming disorder (IGD). Available studies indicate that individuals who initiate Internet use at younger ages exhibit an increased risk for general Internet addiction. Prior research also suggests unique cognitive processes in online gaming, such that an individual's overall sense of self-worth can become contingent upon self-esteem derived from the gaming environment...
June 2017: Cyberpsychology, Behavior and Social Networking
https://www.readbyqxmd.com/read/28557509/insomnia-symptoms-drive-changes-in-suicide-ideation-a-latent-difference-score-model-of-community-adults-over-a-brief-interval
#6
Kelly L Zuromski, Ian Cero, Tracy K Witte
Insomnia is robustly associated with suicidal behavior, but methodological limitations in existing studies hinder nuanced understanding of this relationship. The current study addressed these limitations by utilizing a longitudinal design and advanced statistical modeling. Participants who endorsed lifetime experience of suicidal behavior were recruited through Amazon's Mechanical Turk (N = 589) and completed self-report online surveys at 6 time points over a 15-day period. Latent difference score modeling was utilized to investigate whether levels and/or changes in insomnia symptoms drive subsequent changes in suicide ideation, or vice versa...
May 29, 2017: Journal of Abnormal Psychology
https://www.readbyqxmd.com/read/28550711/behavioral-economic-substitution-between-conventional-cigarettes-and-e-cigarettes-differs-as-a-function-of-the-frequency-of-e-cigarette-use
#7
Sarah E Snider, K Michael Cummings, Warren K Bickel
BACKGROUND: Models measuring the interactions between consumption of conventional cigarettes and electronic cigarettes (e-cigarettes) in the marketplace are becoming vital forecast tools as the popularity of e-cigarettes increases and policy on tobacco products changes. Behavioral economics, which involves the integration of psychology and consumer demand, can be used to measure individuals' purchase behavior under different marketplace conditions. Our goal was to measure hypothetical conventional cigarette and e-cigarette purchasing among smokers with varying e-cigarette use patterns...
May 19, 2017: Drug and Alcohol Dependence
https://www.readbyqxmd.com/read/28536096/harnessing-facebook-for-smoking-reduction-and-cessation-interventions-facebook-user-engagement-and-social-support-predict-smoking-reduction
#8
Sunny Jung Kim, Lisa A Marsch, Mary F Brunette, Jesse Dallery
BACKGROUND: Social media technologies offer a novel opportunity for scalable health interventions that can facilitate user engagement and social support, which in turn may reinforce positive processes for behavior change. OBJECTIVE: By using principles from health communication and social support literature, we implemented a Facebook group-based intervention that targeted smoking reduction and cessation. This study hypothesized that participants' engagement with and perceived social support from our Facebook group intervention would predict smoking reduction...
May 23, 2017: Journal of Medical Internet Research
https://www.readbyqxmd.com/read/28529439/pubertal-timing-and-youth-internalizing-psychopathology-the-role-of-relational-aggression
#9
Hayley Pomerantz, Justin Parent, Rex Forehand, Nicole Lafko Breslend, Jeffrey P Winer
The current study examined relational aggression as a potential mechanism that explains the association between off-time pubertal development and internalizing problems in youth. Youth gender was also examined as a moderator for the association between these variables. It was hypothesized that early pubertal maturation would be associated with higher levels of relationally aggressive behavior which, in turn, would be associated with elevated levels of internalizing problems. Parents of 372 children between the ages of 8 and 17 were recruited through Amazon's Mechanical Turk...
February 2017: Journal of Child and Family Studies
https://www.readbyqxmd.com/read/28508382/think-fast-rapid-assessment-of-the-effects-of-episodic-future-thinking-on-delay-discounting-in-overweight-obese-participants
#10
Jeffrey S Stein, Yan Yan Sze, Liqa Athamneh, Mikhail N Koffarnus, Leonard H Epstein, Warren K Bickel
Accumulating laboratory-based evidence indicates that reducing delay discounting (devaluation of delayed outcomes) with the use of episodic future thinking (EFT; mental simulation of future events) improves dietary decision-making and other maladaptive behaviors. Recent work has adapted EFT for use in the natural environment to aid in dietary and weight control by engaging participants in EFT repeatedly throughout the day. These efforts may benefit from minimizing the amount of time required for measurement and implementation of EFT...
May 15, 2017: Journal of Behavioral Medicine
https://www.readbyqxmd.com/read/28494000/validating-bayesian-truth-serum-in-large-scale-online-human-experiments
#11
Morgan R Frank, Manuel Cebrian, Galen Pickard, Iyad Rahwan
Bayesian truth serum (BTS) is an exciting new method for improving honesty and information quality in multiple-choice survey, but, despite the method's mathematical reliance on large sample sizes, existing literature about BTS only focuses on small experiments. Combined with the prevalence of online survey platforms, such as Amazon's Mechanical Turk, which facilitate surveys with hundreds or thousands of participants, BTS must be effective in large-scale experiments for BTS to become a readily accepted tool in real-world applications...
2017: PloS One
https://www.readbyqxmd.com/read/28493743/stimulus-selectivity-of-drug-purchase-tasks-a-preliminary-study-evaluating-alcohol-and-cigarette-demand
#12
Justin C Strickland, William W Stoops
The use of drug purchase tasks to measure drug demand in human behavioral pharmacology and addiction research has proliferated in recent years. Few studies have systematically evaluated the stimulus selectivity of drug purchase tasks to demonstrate that demand metrics are specific to valuation of or demand for the commodity under study. Stimulus selectivity is broadly defined for this purpose as a condition under which a specific stimulus input or target (e.g., alcohol, cigarettes) is the primary determinant of behavior (e...
June 2017: Experimental and Clinical Psychopharmacology
https://www.readbyqxmd.com/read/28476264/a-pilot-study-of-online-feedback-for-adult-drinkers-50-and-older-feasibility-efficacy-and-preferences-for-intervention
#13
Alexis N Kuerbis, Lisa Hail, Alison A Moore, Frederick J Muench
Normative (NF) and personalized feedback (PF) are moderately effective brief interventions for at-risk drinking middle-aged and older adults. This study tested the feasibility of online feedback for drinkers 50 and older. This study's aims were to identify whether there is differential effectiveness of PF over NF in prompting drinkers 50years old and older to plan for change and to determine potential preferences for intervention among adult drinkers 50 and older with practical knowledge about computers. METHOD: Using Amazon's Mechanical Turk, 138 male and female drinkers aged 50 to 75+ were recruited to complete an online survey that asked about their: perceptions of their drinking, quantity and frequency of drinking, and any comorbid health and/or mental health disorders/medications...
June 2017: Journal of Substance Abuse Treatment
https://www.readbyqxmd.com/read/28475047/retrieval-of-sentence-sequences-for-an-image-stream-via-coherence-recurrent-convolutional-networks
#14
Cesc Park, Youngjin Kim, Gunhee Kim
We propose an approach for retrieving a sequence of natural sentences for an image stream. Since general users often take a series of pictures on their experiences, much online visual information exists in the form of image streams, for which it would better take into consideration of the whole image stream to produce natural language descriptions. While almost all previous studies have dealt with the relation between a single image and a single natural sentence, our work extends both input and output dimension to a sequence of images and a sequence of sentences...
May 2, 2017: IEEE Transactions on Pattern Analysis and Machine Intelligence
https://www.readbyqxmd.com/read/28447815/development-of-the-healthcare-triggering-questionnaire-in-adult-sexual-abuse-survivors
#15
Julie B Schnur, William F Chaplin, Kiran Khurshid, Jazmin N Mogavero, Rachel E Goldsmith, Young-Sun Lee, Leib Litman, Guy H Montgomery
OBJECTIVE: One in 4 women and 1 in 10 men in the United States are survivors of sexual abuse (SA). For these survivors, healthcare experiences may trigger memories, thoughts, feelings or sensations related to this past abuse. Such triggering can be associated with negative responses to healthcare (e.g., anxiety, avoidance). However, to date, no healthcare triggering assessment tool exists. Therefore, the study goal was to describe the prevalence of healthcare triggering, to develop a brief Healthcare Triggering Questionnaire (HTQ), and to examine its initial validity...
April 27, 2017: Psychological Trauma: Theory, Research, Practice and Policy
https://www.readbyqxmd.com/read/28437124/marijuana-and-tobacco-cigarettes-estimating-their-behavioral-economic-relationship-using-purchasing-tasks
#16
Erica N Peters, Zachary R Rosenberry, Gillian L Schauer, Kevin E O'Grady, Patrick S Johnson
Although marijuana and tobacco are commonly coused, the nature of their relationship has not been fully elucidated. Behavioral economics has characterized the relationship between concurrently available commodities but has not been applied to marijuana and tobacco couse. U.S. adults ≥18 years who coused marijuana and tobacco cigarettes were recruited via Mechanical Turk, a crowdsourcing service by Amazon. Participants (N = 82) completed online purchasing tasks assessing hypothetical marijuana or tobacco cigarette puff consumption across a range of per-puff prices; 2 single-commodity tasks assessed these when only 1 commodity was available, and 2 cross-commodity tasks assessed these in the presence of a concurrently available fixed-price commodity...
June 2017: Experimental and Clinical Psychopharmacology
https://www.readbyqxmd.com/read/28435281/first-do-no-harm-institutional-betrayal-and-trust-in-health-care-organizations
#17
Carly Parnitzke Smith
PURPOSE: Patients' trust in health care is increasingly recognized as important to quality care, yet questions remain about what types of health care experiences erode trust. The current study assessed the prevalence and impact of institutional betrayal on patients' trust and engagement in health care. PARTICIPANTS AND METHODS: Participants who had sought health care in the US in October 2013 were recruited from an online marketplace, Amazon's Mechanical Turk. Participants (n = 707; 73% Caucasian; 56...
2017: Journal of Multidisciplinary Healthcare
https://www.readbyqxmd.com/read/28412893/public-attitudes-and-feelings-of-warmth-toward-women-and-men-experiencing-depression-during-the-perinatal-period
#18
Jennifer N Felder, Sarah Banchefsky, Bernadette Park, Sona Dimidjian
OBJECTIVE: Depression is a major public health concern and often goes untreated. In response to a growing body of research documenting stigma as a barrier to depression care, this study focused on examining public stigma toward potentially vulnerable subpopulations. METHODS: Participants (N=241) were recruited from Amazon's Mechanical Turk and randomly assigned to provide anonymous ratings on attitudes and feelings of warmth toward pregnant women and expectant fathers experiencing depression, mothers and fathers experiencing postpartum depression, or women and men experiencing depression during nonperinatal periods...
April 17, 2017: Psychiatric Services: a Journal of the American Psychiatric Association
https://www.readbyqxmd.com/read/28412153/the-effect-of-counseling-on-willingness-to-use-a-hypothetical-medication-and-perceptions-of-medication-safety
#19
Michael Bitonti, Payal Patel, Rebecca Dickinson, Peter Knapp, Susan J Blalock
BACKGROUND: Poor medication adherence is an ongoing issue, and contributes to increased hospitalizations and healthcare costs. Although most adverse effects are rare, the perceived risk of adverse effects may contribute to low adherence rates. OBJECTIVES: The objective of this study was to determine how adverse effect likelihood and pharmacist counseling on adverse effect prevention affects individuals': (1) willingness to use a hypothetical medication and (2) perceptions of medication safety...
March 31, 2017: Research in Social & Administrative Pharmacy: RSAP
https://www.readbyqxmd.com/read/28396304/comparing-crowdsourcing-and-friendsourcing-a-social-media-based-feasibility-study-to-support-alzheimer-disease-caregivers
#20
Daniel Robert Bateman, Erin Brady, David Wilkerson, Eun-Hye Yi, Yamini Karanam, Christopher M Callahan
BACKGROUND: In the United States, over 15 million informal caregivers provide unpaid care to people with Alzheimer disease (AD). Compared with others in their age group, AD caregivers have higher rates of stress, and medical and psychiatric illnesses. Psychosocial interventions improve the health of caregivers. However, constraints of time, distance, and availability inhibit the use of these services. Newer online technologies, such as social media, online groups, friendsourcing, and crowdsourcing, present alternative methods of delivering support...
April 10, 2017: JMIR Research Protocols
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