Creativity is the Gift that Keeps on Giving

- Hari Srinivasan

"Every creation is a reflection of the creator's unique perspective."

Hari Srinivasan

 Creativity is the heart and soul of innovation.

- Hari Srinivasan

Task Load Index

The NASA-TLX (Task Load Index) questionnaire is a tool developed by NASA to assess the workload and subjective workload experienced by individuals performing a task. Though initially designed for pilots, it is widely used across various industries including autism research 

The questionnaire has 6 subscales/submeasures, that assess different dimensions of workload. 

• Mental Demand: mental effort and cognitive load required to perform the task.
• Physical Demand: physical effort and exertion involved in performing the task.
• Temporal Demand: perceived time pressure and the amount of time available to complete the task.
• Performance: individual's perception of their own performance during the task.
• Effort: perceived level of effort and energy expenditure required to complete the task.
• Frustration: degree of annoyance, stress, and dissatisfaction experienced during the task.

Scoring and Interpretation

Participants rate each submeasure on a scale of 0 to 100. Scoring and interpretation vary depending on the specific study or context. Generally, higher scores indicate a higher perceived workload in the respective submeasure. 

Researchers often analyze the individual submeasure scores and the overall workload score to gain insights into the specific dimensions of workload that are most significant in a given task or situation. The questionnaire can help identify areas where workload can be optimized or where additional support or resources may be required.

Examples of use in Autism Research in evaluating workload and cognitive demands 

Study: "Task load and verbal responses to questions in children with autism spectrum disorder"Citation: Nishida, T., Yuhi, T., Kaneoke, Y., Kurosawa, K., & Dan, I. (2014). Task load and verbal responses to questions in children with autism spectrum disorder. Frontiers in Human Neuroscience, 8, 937.
Link: https://doi.org/10.3389/fnhum.2014.00937

Study: "Measurement of cognitive workload in individuals with high-functioning autism spectrum disorder using a virtual reality task"Citation: Park, S. M., Chong, S. C., Lim, S. L., Kim, J. S., & Kim, J. S. (2020). Measurement of cognitive workload in individuals with high-functioning autism spectrum disorder using a virtual reality task. Applied Sciences, 10(2), 581.
Link: https://doi.org/10.3390/app10020581

 Creativity is the antidote to monotony.

- Hari Srinivasan

Simultaneity Window

[Concepts in Sensorimotor Research]

Simultaneity Window (SW) refers to a temporal window within which the brain perceives stimuli from different sensory modalities as occurring simultaneously. It represents the temporal range over which the brain integrates sensory inputs from different modalities into a coherent percept.

If stimuli from different modalities fall within the SW, they are likely to be perceptually integrated, whereas if they fall outside the SW, they may be perceived as separate events.

Commonly used research tasks to measure SW

• Temporal Order Judgment (TOJ): participants are presented with 2 stimuli, one in each sensory modality (e.g., a flash of light and a beep), and they have to determine the order in which the stimuli occurred.
• Simultaneity Judgment (SJ): Participants are presented with 2 stimuli, from different modalities, and they have to judge whether the stimuli were perceived as simultaneous or not.
• Temporal Alignment Task: Participants are presented with a stimulus in one modality and have to adjust the timing of a stimulus in the other modality until it is perceived as synchronous with the first stimulus. This helps in determining the temporal window of integration.
• Temporal Recalibration Task: Participants are exposed to a consistent asynchrony between stimuli from different modalities over a period of time. Following this exposure, their perception of simultaneity is tested to see if it has been recalibrated.

The perception of simultaneity can vary across individuals and is influenced by various factors such as attention, age, disability, the specific sensory modalities involved, and distance of stimuli (as determined by, say the PPS).

 To create is to be fully human.

- Hari Srinivasan