Self-paced
Researcher: Newly formed neurons can help to heal an injured brain but only if they develop into the type of neurons that are most common in the injured area. ███████ ████ █████ ████ ████ █ ████ ██ ███ █████ ██████ ███ ████████ ██ ████████ █████ ██████ ███████ ██ ███ ████████ █████ ██████ ████████ █████ ████████ ███ ████ ████ ██████ ██ ███ █████████
Summary
The stimulus can be diagrammed as follows:
Notable Valid Inferences
If the striatum is injured, then newly formed neurons will not help heal the injury.
3.
If the researcher's statements are █████ █████ ███ ██ ███ █████████ ████ ████ ██ █████
a
Newly formed neurons █████████ ███████ ████ ████████ █████ ███████ ██ █████ ██ ███ █████ █████ ████ ███ █████████
Could be false. We don’t have any information about neuron development into midsized spiny neurons outside of the striatum.
b
Newly formed neurons ███ ████████ █████ ██ ███████ █████ ██ ███ █████ ███████ █████ ███ ██████ ███████
Could be false. We don’t know anything about the amount of time between injury and appearance of newly formed neurons.
c
Midsized spiny neurons ███ ███ ███ ████ ██████ ████ ██ ██████ ██ ███ ████ ██ ███ █████ █████ ████ ███ █████████
Could be false. We don’t know anything about what kinds of neurons are most common in areas of the brain other than the striatum.
d
In cases of ██████ ██ ███ █████████ █████ ██████ ███████ ████ ███ ████ ██ ████ ███ ███████
Must be true. Chaining the conditional claims in the stimulus together reveals that if the striatum is injured, then the newly formed neuron will not help heal the injury.
e
In most cases ██ █████ ███████ █████ ██████ ███████ ██ ███ ████ ██ ████ ███ ███████
Could be false. We don’t have any information about the quantity of brain injuries that are or aren’t healed with the assistance of newly formed neurons.