Dienst van SURF
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OBJECTIVES: To make practical recommendations for improving oral hygiene behavior (OHB) potential predictors based on the Theory of Planned Behavior (TPB) were assessed. Measurements of oral health knowledge (OHK) and the expected social effect for having healthy teeth were included.METHODS: 216 recruits in the Dutch Army ground forces completed a questionnaire about oral hygiene behavior, attitudes, social norms, perceived behavioral control (PBC), intention to perform optimal OHB, OHK, and expected social outcomes.RESULTS: The multivariate regression analysis revealed that attitude and PBC explained 37.2% of the variance in intention to perform optimal oral hygiene behavior, which is a substantial proportion. Furthermore, actual oral hygiene behavior was only predicted by attitude, explaining 7.1% of the variance.CONCLUSION: The present findings suggest that recruits' oral hygiene behavior may be improved by promoting a more positive attitude and especially by enhancing perceived behavior control.
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The massive die-off of the sea urchin Diadema antillarum in 1983–1984 is one the main reasons for low coral recruitment and little coral recovery in the Caribbean. As the natural recovery of D. antillarum is slow to non-existent, multiple restoration studies have been attempted. There are currently three different approaches to obtain individuals for restocking: the translocation of wild-collected juveniles or adults, lab-reared juveniles cultured from wild-collected settlers, or lab-reared juveniles cultured from gametes. All three methods are costly and can only be applied on a relatively small scale. We here propose a fourth, new, approach, which we term assisted natural recovery (ANR) of D. antillarum populations. ANR, a concept already applied in terrestrial restoration to restore forests and grasslands, can accelerate succession by removing barriers to natural recovery. In this study, performed on the Dutch Caribbean island of Saba, suitable settlement substrate was provided in the form of bio ball streamers that were attached to the reef shortly before the settlement season. At the end of the experiment, reefs with streamers had significantly higher D. antillarum recruit densities than control reefs without additional settlement substrate, indicating that the lack of settlement substrate is an important factor constraining natural recovery. However, D. antillarum recruit abundance was low compared to the measured settlement rates, possibly due to low post-settlement survival. The size distribution of recruits showed that recruits almost never became larger than 20 mm, which is likely due to predation. We conclude that, next to low settlement availability, low post-settlement survival and high predation on recruits also constrain the natural recovery of D. antillarum populations on Saba. To improve the survival of settlers till adults, we propose to 1) reduce predation on settlers by using bio balls or other substrates that can provide shelter to larger individuals and 2) optimize the reef habitat by removing macroalgae, either manually or by facilitating other herbivores. To improve the survival of recruits, we suggest to 1) choose sites with a known lower predation density or 2) protect recruits with a corral around the reef underneath the streamers. The combination of these measures could improve prospects for ANR, and we expect this new approach can contribute to the recovery of D. antillarum populations in the future.
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Doelstellingen De mate van betrokkenheid van jonge gebruikers bij wervingsadvertenties voor geldezels op Instagram onderzoeken. Methoden Drie advertenties die de belangrijkste mechanismen voor betrokkenheid bij cybercriminaliteit weerspiegelen en gericht waren op Nederlandse gebruikersclusters werden op twee Instagram-plaatsingen geplaatst. Door middel van dit quasi-experimentele 3 × 2 factorial design konden we het bereik en de weergaven van de advertenties, de doorklikratio's, het geslacht van de deelnemers en de temporele verdelingen van de gebruikersbetrokkenheid analyseren. Resultaten De analyse toont aan dat tot 3% van de jonge gebruikers zich bezighield met de advertenties, vooral met advertenties die een luxe levensstijl promoten en neutralisatietechnieken gebruiken. Mannen waren vaker betrokken en 's nachts werd er meer geklikt. Conclusies Sommige jonge Instagram-gebruikers lijken geneigd om geld te verdienen via hun bankpas en lopen het risico om online betrokken te raken bij cybercriminaliteit. We moedigen toekomstig onderzoek aan om het gebruik van sociale media in criminologische studies verder te onderzoeken. ENGLISH Objectives Examine the level of engagement of young users with money mule recruitment ads on Instagram. Methods Three ads reflecting key cybercrime involvement mechanisms and targeting Dutch user clusters were run on two Instagram placements. By means of this quasi-experimental 3 × 2 factorial design, we were able to analyze the reach and views of the ads, click-through rates, gender of the participants, and temporal distributions of user engagement. Results Mimicking actual recruitment environments, analysis shows that up to 3% of young users engaged with the ads, especially those promoting a luxury lifestyle and using neutralization techniques. Men were more likely to engage, and click-through rates were higher at night. Conclusions Some young Instagram users seem prone to making money through their bank cards and risk becoming involved in cybercrime online. We encourage future research to explore further the use of social media in criminological studies. This is a post-peer-review, pre-copyedit version of an article published in Journal of Experimental Criminology. The final authenticated version is available online at: https://link.springer.com/article/10.1007/s11292-022-09537-7