At present, the measurement of psychological load in academia is mainly divided into two categories: Physiological index measurement. Mainly by measuring blood pressure, heartbeat, skin conductivity, brain waves and other physiological indicators to reflect the psychological load level of the subjects. There is a big problem with this method. First, changes in whatsapp Database psychological load can indeed be reflected in physiological indicators, but the mechanism is very complex, and changes in physiological indicators are not entirely caused by psychological factors. Therefore, the method of monitoring physiological indicators to reflect the level of whatsapp Database psychological load is itself debatable. Furthermore, this approach is largely unfeasible for enterprise-level user research efforts. Self-report assessment method. Mainly let the subjects fill in the psychological scale to measure the psychological load level.
We currently use a software version of the NASA-TLX scale developed by NASA to measure the user's level of mental load while completing a test task. The NASA-TLX scale is one of the most widely applicable and valid psychological load scales whatsapp Database at present, and its simple structure is also very suitable for daily user research work. The six dimensions of the NASA-TLX scale: Mental Demand: The level of mental effort expended to complete the task Physical Demand: The degree of physical effort required to complete the task Temporal Demand: The length of time required to complete the task Performance (Performance): the effect of the whatsapp Database completion of the task Effort: The level of effort required to complete the task Frustration: Frustration after completing a task Participants were asked to rate their previous behavior on these six dimensions. The basic principle is the same as that of the common Richter scale, so it will not be repeated here.
After scoring, the weight of each dimension needs to be set. The basic principle is to rank the importance of six dimensions, and to calculate the final psychological load index according to different rankings corresponding to different weights whatsapp Database of each dimension. For mobile input method products, input performance and mental load level directly affect the overall user experience. Therefore, the design of high input performance and low psychological load will become the direction of experience upgrade. Tips: Since the NASA-TLX scale needs to be whatsapp Database filled out by users, the interpretation of the meaning of each dimension becomes particularly important. We have to make sure that different users understand it roughly the same. One problem with the use of the NASA-TLX scale in Western countries is that Western users tend to exaggerate their subjective feelings.