Question 1

The pattern of this chart shows:  &#10;A) Change in slope, no change in trend across phases&#10;B) Drift and change in level&#10;C) Change in slope, change in level&#10;D) None of the above

Accepted Answer

A

Question 2

The pattern of this chart shows:  &#10;A) Change in slope&#10;B) Drift and change in level&#10;C) No change in level but change in slope&#10;D) None of the above.

Accepted Answer

B

Question 3

Directionality in the data-whether within or across phases-is called slope.

Accepted Answer

False

Question 4

Visual analysis of data is particularly reliable because one does not have to be concerned about the possibility of autocorrelation.

Accepted Answer

Visual analysis of data, while useful for identifying patterns and outliers, does not inherently address statistical concerns such as autocorrelation. Autocorrelation must be tested for and considered separately through statistical methods.

Question 5

Can you have a stable trend if the line made up of linked data points is continuously up and down? Draw a diagram indicating your answer.

Accepted Answer

A stable trend indicates that the data points are fluctuating around a central value, not continuously increasing or decreasing.

Question 6

What do you make of a situation where the client's behavior changes from bad to good to bad during baseline? Should you start the intervention with a sense of stability, if curvilinear, behaviors?

Accepted Answer

A baseline should ideally show stability in the behavior being measured before starting an intervention to ensure that any changes observed can be attributed to the intervention itself. Curvilinear or highly variable patterns during baseline suggest that other variables may be influencing the behavior, and these should be understood and controlled for if possible before beginning the intervention.

Question 7

Trend across phases is called:&#10;A) Variability&#10;B) Slope&#10;C) Drift&#10;D) None of the above

Accepted Answer

Trend across phases is called drift.

Deck 20: Visual Analysis of Single-System Design Data