Week 8

Question 1

Ga, Bal, Pos, Bio, PA

What types of data can wearable and smartphone sensors measure in relation to movement?

Answer 1

Gait, balance, posture, biomechanics, and physical activity.

Question 2

Da Pr, St, Ano, Eth C

What are the main challenges when collecting large datasets at scale from wearables?

Answer 2

Data privacy, storage, anonymization, and ethical considerations.

Question 3

Questionnaire?

What are some examples of self-report measures for physical activity?

Answer 3

Global PAQ (Physical Activity Questionnaire), GP-PAQ.

Question 4

Objective data is M…, subjective is R…

What is the difference between objective and subjective data in movement analysis?

Answer 4

Objective data are measured (e.g., step count), while subjective data are reported (e.g., survey responses).

Question 5

1 Met = … O2/kg/min

What is the MET (Metabolic Equivalent of Task) value for quiet sitting?

Answer 5

1 MET = 3.5 ml O2/kg/min.

Question 6

Apple HK, Google F, Fb

Name three consumer devices that collect movement data.

Answer 6

Apple Health Kit, Google Fit, Fitbit.

Question 7

Priv, Anon, Hea In, Pot Bi in data

What ethical considerations must researchers consider when using data from wearables?

Answer 7

Privacy, anonymization, health inequality, and potential biases in data.

Question 8

Method that adds random N to protect individual P while preserving OT

What is differential privacy?

Answer 8

A method that adds random noise to data to protect individual privacy while preserving overall trends.

Question 9

Test to determine if Ano data can be reidentified with basic Inv Sk

What is a ‘Motivated Intruder Test’?

Answer 9

A test to determine if anonymized data can be re-identified by someone with basic investigative skills.

Question 10

IV is A with higher O of the Ou

In regression analysis, what does an odds ratio (OR) greater than 1 indicate?

Answer 10

The independent variable is associated with higher odds of the outcome.