Much research has shown that social media platforms have substantial population biases. However, very little is known about how these population biases affect the many algorithms that rely on social media data. Focusing on the case study of geolocation inference algorithms and their performance across the urban-rural spectrum, we establish that these algorithms exhibit significantly worse perfo...

Inspired by feminist post-structural thinking and with a discourse analytic approach, this study’s main theme is gendered identity, disability and sport. It consists of four separate, but interrelated, empirical studies and focuses on two research questions. Firstly, how do female and male wheelchair racers construct and perform their identities? Secondly, how are female and male wheelchair rac...

We review the literature that identifies selection bias in media-based data and propose a theoretical model of the sources of these biases. Given the implications for validity and reliability, we conclude that newspaper data often do not reach acceptable standards for event analysis and that using them can distort findings and misguide theorizing. Furthermore, media selection biases are resista...

Cell-phone-only (CPO) households differ along key variables from non-CPO households, creating potential coverage biases in landline-only random-digit-dialing (RDD) surveys. Researchers have attempted to correct for this by weighting their data based on demographic differences. Previous research, however, has not examined CPO coverage biases in media-use surveys—an important oversight as cell ph...

Abstract. The player of squash has a choice between two options when his/her opponent changes the score from 8:7 to 8:8. The player to receive has to decide whether to play until 9th or until 10th point. We observe in this paper that the score of the squash game can be modelled as a Markov chain. Thus using standard techniques of Markov processes, we can derive the optimal strategy for the squa...

The idea that sport and physical activity empower women is common, perpetuated by sources as diverse as the popular media and feminist scholars. But not only is empowerment a notoriously under-theorised concept, it is especially problematic when applied to physical activity. While sport may appear to endow power (by helping women increase their confidence and self-esteem), organised physical ac...