A rover that waits for evidence

How much evidence should the rover wait for?

Make your own investigation

Write a wait rule. Test an isolated false reading and a real object that lasts for several readings.

Count consecutive positive readings, resetting to zero on a negative reading. Open the gate when the count reaches the requirement.

Case cards

Cut these cards apart. Use the original example first, then let a partner supply a changed case. Keep sealed/final cards with the teacher until the learner commits a rule.

Case 1

Reading detected: False

Real object: False

My prediction and reason:

Case 2

Reading detected: True

Real object: False

My prediction and reason:

Case 3

Reading detected: False

Real object: False

My prediction and reason:

Case 4

Reading detected: True

Real object: True

My prediction and reason:

Case 5

Reading detected: True

Real object: True

My prediction and reason:

Case 6

Reading detected: True

Real object: True

My prediction and reason:

What this cannot establish

Waiting can reduce isolated false readings and also delay or miss a brief real target.