This comment discusses the impact of social media rule enforcement protocols on research on online data sources. It argues that the conclusions of the article ‘Do Islamic State's Deadly Attacks Disengage, Deter, or Mobilize Supporters?’ concerning the recruitment effects of deadly attacks cannot be assumed to hold when considering the timing of Twitter account suspensions. It highlights four ways in which suspensions can confound evidence of demobilization despite the introduction of control variables and fixed-effects model specifications. All change the composition of the sample in four non-random ways. First, suspending connected Islamic State accounts may result in follower loss. Secondly, Twitter suspension procedures may be tied to account characteristics, such as follower accrual rates. Thirdly, suspended accounts that re-emerge introduce replication bias. Fourthly, account closure may reflect user movement to other platforms in response to changing security environments following deadly attacks. In conclusion, caution is advised when platform-introduced variation risks altering the sample composition in non-random ways.

The consistently low credit-taking rates, 16 percent in 2016 (Global Terrorism Database), continue to challenge the understanding of terrorism as “propaganda of the deed” twenty years after researchers initially pointed out the conundrum. While providing an overview and evaluation of the limited existing literature on credit-taking, this paper draws attention to three core problems in the current literature on terrorist credit-taking, which may have led the low credit-taking rates to appear more puzzling than is due. First, the available explanations struggle to find corroboration when empirically tested and many also show theoretical shortcomings with strong unspoken assumptions and unclear predictions of credit-taking behavior. Second, data structure and data availability unnecessarily narrow our academic understanding of credit-taking. Finally, theories focused on group characteristics such as religious motivation or state sponsorship suffer from severe issues of sample bias due to unintended selection on the dependent variable. The paper concludes with suggestions for future research less prone to the problematic issues identified in the article. A re-orientation toward a less restrictive and more fine-grained understanding of credit-taking is advised.

Artiklen præsenterer resultaterne af en undersøgelse lavet i Zambia med 177 respondenter i alderen 10-16 år. Undersøgelsen fokuserer på barnet samt på lokalsamfund med sportsakademier. Sportens indflydelse på udsatte børn analyseres ved hjælp af Marsh teori om selvopfattelse.

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