Validation of the Voluntary Participation in Online Surveys Scale

A comprehensive understanding of participants' motives to complete web-based surveys has the potential to improve dataquality. In this study we tested the construct validity of a scale developed to measure motivation to participate in webbasedsurveys. We expected that 7 different motivations observed in our previous study will form a 3-factor structure, aspredicted by Self-Determination Theory. This web-based questionnaire study comprised 257 participants completing theVoluntary Participation in Online Studies Scale. Their responses to 21 items underwent a principal component analysisand confi rmatory factor analysis. As we expected, three factors were identifi ed: intrinsic motivation, extrinsic motivationand amotivation. In line with Self-Determination Theory there are three distinct groups of motives among web-surveysparticipants with amotivation as an understudied motivational state. We discuss the results suggesting which types ofmotivation might lead to higher quality of data with an emphasis on possible negative effects of amotivation

Wpływ parametrów procesu druku metodą FFF i jednorodności makrostruktury na udarność PLA

The article presents studies of the additive manufacturing printing parameters influence on the impact strength of PLA samples obtained by the fused filament fabrication (FFF) method. Two process variables were taken into account in the research program: the height of the printed layer and the printing temperature. An optical microscope was used to analyze the cross-section image (breakthrough) of the samples. The impact strength was determined at −40°C and 23°C. Selected geometric features of the macrostructure (uniformity and thickness of individual layers, voids) determined on the basis of the sample cross-section image analysis, enhanced the possibility of assessing the PLA impact strength, depending on the adopted process variables and the temperature at which the experiment was carried out.W artykule przedstawiono badania wpływu parametrów druku addytywnego na udarność próbek z PLA otrzymanych metodą FFF (fused filament fabrication). W programie badań uwzględniono dwie zmienne procesowe: wysokość drukowanej warstwy i temperaturę druku. Do analizy obrazu przełomu próbek wykorzystano mikroskop optyczny. Oznaczono udarność w temperaturze -40°C oraz 23°C. Wybrane cechy geometryczne makrostruktury (równomierność i grubość poszczególnych warstw, puste przestrzenie) wyznaczone na podstawie analizy obrazu przekroju próbek, pogłębiły możliwość oceny udarności PLA w zależności od przyjętych zmiennych procesowych, a także temperatury w jakiej zrealizowano eksperyment

Validation of the Voluntary Participation in Online Surveys Scale

A comprehensive understanding of participants’ motives to complete web-based surveys has the potential to improve data quality. In this study we tested the construct validity of a scale developed to measure motivation to participate in webbased surveys. We expected that 7 different motivations observed in our previous study will form a 3-factor structure, as predicted by Self-Determination Theory. This web-based questionnaire study comprised 257 participants completing the Voluntary Participation in Online Studies Scale. Their responses to 21 items underwent a principal component analysis and confi rmatory factor analysis. As we expected, three factors were identifi ed: intrinsic motivation, extrinsic motivation and amotivation. In line with Self-Determination Theory there are three distinct groups of motives among web-surveys participants with amotivation as an understudied motivational state. We discuss the results suggesting which types of motivation might lead to higher quality of data with an emphasis on possible negative effects of amotivation