You can export CBC data (discrete choice) from Lighthouse Studio to a .CHO format. The .CHO format files are used in many other Sawtooth Software programs for analyzing CBC data, including Latent Class, and Hierarchical Bayes (HB) applications. Some power-users modify the .CHO file (usually with an automated script outside of Lighthouse Studio) for certain advanced applications. The format is as follows:
8960 2 6 12 1
6 1
3 1
2 1 2 3 2 3
3 3 3 1 3 1
4 2 1 2 1 2
2 32
.
.
.
(lines 3-7 repeated, for 11 more tasks for this respondent)
Line 1: Respondent record information
8960 |
2 |
6 |
12 |
1 |
Respondent Number |
"Extra" Variables |
Number of Attributes |
Number of Choice Tasks |
None option 0=N, 1=Y, 2=Dual Response None |
Line 2: "Extra" Variables (may include as many numbers as specified on Line 1)
6 |
1 |
Interview Duration |
Segmentation Variable |
Lines 3-7 are repeated for each choice task
Line 3: Task 1 format
3 |
1 |
Number of concepts in first task |
Depth of preference in first task (always 1) |
Line 4: Levels displayed in first concept
2 |
1 |
2 |
3 |
2 |
3 |
Level 2 of Attribute 1 |
Level 1 of Attribute 2 |
Level 2 of Attribute 3 |
Level 3 of Attribute 4 |
Level 2 of Attribute 5 |
Level 3 of Attribute 6 |
Note: Missing levels (partial profile and alternative specific designs) are indicated with "0"'s.
Line 5: Levels displayed in second concept
3 |
3 |
3 |
1 |
3 |
1 |
Level 3 of Attribute 1 |
Level 3 of Attribute 2 |
Level 3 of Attribute 3 |
Level 1 of Attribute 4 |
Level 3 of Attribute 5 |
Level 1 of Attribute 6 |
Line 6: Levels displayed in third concept
4 |
2 |
1 |
2 |
1 |
2 |
Level 4 of Attribute 1 |
Level 2 of Attribute 2 |
Level 1 of Attribute 3 |
Level 2 of Attribute 4 |
Level 1 of Attribute 5 |
Level 2 of Attribute 6 |
Line 7: Choice information
2 |
32 |
Concept Chosen |
Task duration |
* In this example, the none option, if chosen, would be represented as concept 4.
** Missing answers are indicated by Concept Chosen set to "0."
Coding Dual Response None Answers
In the standard .CHO layout, the coding of each task is completed by a line with two values:
"Choice" and "Task Duration." With the "Dual-Response None" format, each choice task is completed
by a line with four values, such as:
Line 7: Dual-Response None Choice information
3 |
27 |
1 |
4 |
1st stage choice |
Task duration |
Buy=1 No Buy=2 |
Task duration |