In this article I examine ordinary ethical practices that underpin intimate relations in the Brazilian state of Maranhão. I focus ethnographically on jealousy and seduction as complementary forms of play, which simultaneously affirm and challenge such aspects of emotional relatedness as trust and love. I argue that since a measure of concealment is inherent in both these play-forms, they render invisible those actions that challenge conventional moral injunctions, such as sexual infidelity. I consequently offer an ethnographic theory of ‘invisibility’ by which opacity, uncertainty and paradox become intrinsic to the emergence of intimate relations as ethical practices in their own right.

In line with self-determination theory (SDT: Deci & Ryan, 1985, 2002) the satisfaction of the basic psychological needs for autonomy, competence, and relatedness has been identified as an important predictor of behavior and optimal functioning in various contexts including exercise. The lack of a valid and reliable instrument to assess the extent to which these needs are fulfilled among Portuguese exercise participants limits the evaluation of causal links proposed by SDT in the Portuguese exercise context. The aim of the present study was to translate into Portuguese and validate the Basic Psychological Needs in Exercise Scale (BPNES: Vlachopoulos & Michailidou, 2006). Using data from 522 exercise participants the findings provided evidence of strong internal consistency of the translated BPNES subscales while confirmatory factor analysis supported a good fit of the correlated 3-factor model to the data. The present findings support the use of the translated into Portuguese BPNES to assess the extent of basic psychological need fulfilment among Portuguese exercise participants.