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A. F. Dixson S. Pullen 2000 Intraspecific variation in the vocalizations and hand pad morphology of Southern lesser bush babies ( Galago moholi ): A

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2001 Female guppies agree to differ: Phenotypic and genetic variation in mate-choice behavior and the consequences for sexual selection Evolution 55 1644 1655

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consideration for clinical fMRI studies ( Carter, Heckers, Nichols, Pine, & Strother, 2008 ). Additionally, some p values may not withstand correction for multiple comparisons (e.g., with respect to allelic variation and subjective responses to sad videos

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and development of life history strategies . Human Nature , 20 ( 2 ), 204 – 268 . Fessler , D. M. T. , & Navarrete , C. D. ( 2003 ). Domain-specific variation in disgust sensitivity across the

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historical and contemporary salience of racial categorization in the United States may influence the set and setting for individual psychedelic experiences. Specifically, I argue that the psychosocial factors contributing to variations in mental health between

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Journal of Psychedelic Studies
Authors: André Sevenius Nilsen, Bjørn Erik Juel, Nadine Farnes, Luis Romundstad, and Johan Frederik Storm

the lack of effect might be explained by variation in infusion rate, however, the average maintenance infusion rate ( M : 0.73 [0.5–1.0] mg/kg/h) was on the higher end of what is characterized as sub-anesthetic ketamine (commonly 0.3–0.5 mg/kg/h, up to

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Engagement in responsible or ‘positive play’ strategies is known to be negatively associated with problem gambling, as indexed by measures such as the Problem Gambling Severity Index (PGSI). Less is known about whether positive play is associated with reduced harm or a greater ability to enjoy the recreational benefits of gambling.


This study investigated the relationship between positive play and gambling harm after controlling for PGSI scores and whether positive play moderated the relationship between PGSI scores and harm. It also examined whether positive play was related to perceived benefits associated with gambling.


The study utilised an online panel sample of 554 respondents who completed a survey that included the PGSI, measures of gambling harm drawn from Browne et al. (2016), and the newly developed Positive Play Scale (Wood et al., 2019). The study involved predominantly monthly gamblers with higher levels of gambling risk: 23% problem gamblers; 36% moderate risk; and 21% low risk gamblers.


The results indicated that positive play was negatively associated with reduced gambling harm. The behavioural Positive Play subscales relating to pre-commitment and honesty and control explained additional variation in harm after controlling for PGSI scores. Higher levels of positive play also moderated and reduced the relationship between the PGSI and gambling harm. Perceived benefits were, unexpectedly, found to be higher in problem gamblers and negatively related to positive play.


Behavioural measures of positive play appear to be useful moderating factors in understanding the relationship between problem gambling and harm. Higher-risk gamblers appear to experience both greater costs as well as benefits from gambling, which likely reflects a stronger personal need to engage in the activity.

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. Bittles , A. H. , & Neel , J. V . ( 1994 ). The cost of human inbreeding and their implications for variation at the DNA level . Nature Genetics , 27 , 111 – 130 . Buunk , A. P

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foundations of the FEB hypothesis. The discussion will take its outset from the challenge of explaining variation in economic beliefs and behavior across cultures and individuals. Overall, the conclusion of this paper is that the FEB hypothesis

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). Psychosocial antecedents of variation in girls’ pubertal timing: Maternal depression, stepfather presence, and marital and family stress . Child Development , 71 , 485 – 501 . Ellis , B. J. , Bates , J. E. , Dodge , K. A. , Fergusson , D. M

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