9 Questions
Which type of bias occurs when participants select themselves to join the study?
Self-selection bias
What is the primary concern when examining the risk of selection bias?
Allocation concealment
What is the main characteristic of selection bias?
Caused by differences in the baseline characteristics of the study group
Which type of bias occurs when differences in baseline characteristics of the study group lead to skewed results?
Selection bias
What is one advantage of mobile photography (MDP) over DSLR?
Cost-effectiveness
Which factor plays a major role in defining the picture quality in mobile photography?
Pixel size
What does a larger sensor in a camera allow for?
More detailed depiction of variance in one image
Why is a minimum of 12 MP sensor required for high-quality photographs in mobile photography?
Digital zooming is required to crop the view before taking the photograph
What determines the quantity of light that reaches the sensor in smartphone photography?
Aperture size
Study Notes
- Bias: Systematic error in research methods that influences results in a specific direction
- Selection Bias: Caused by differences in baseline characteristics of study groups due to weak sequence generation or allocation methods
- To minimize selection bias: Review methods of random sequence generation and allocation concealment
- Self-selection Bias: Occurs when participants choose to join studies, resulting in non-representative samples
- Mobile Photography: MDP (Mirrorless Digital Camera) advantages over DSLR (Digital Single-Lens Reflex)
- MDP advantages: Cost-effective, lighter, faster learning curve, continuous light, easier disinfection
- Picture quality factors: Sensor size, pixel size, aperture
- Larger sensor: More competent cameras with larger pixels and ability to capture more light
- Pixel size: More megapixels equals more image detail, a minimum of 12 MP required for high-quality MDP photos
- Aperture: Controls the quantity of light that reaches the sensor, important for optimal image quality. Some camera apps allow adjustment.
Test your knowledge of bias in research methods with this quiz. Learn about the different types of bias such as selection bias, performance bias, detection bias, observer bias, and more.
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