Transaction
A transaction is an interaction between the student and the tutoring system.
Students may make incorrect entries or ask for hints before getting a step correct. Each hint, incorrect action, or correct action is a transaction; and a step can involve one or more transactions.
In the transaction table excerpt below, a list of transactions is displayed for a single student working on two tutor problems. Transaction 9 shows that the student correctly entered a '4' in the tutor interface. Transaction 10 shows the correct entry of the '8'. In both cases, there is one transaction for each step. In transactions 11 and 12, we see incorrect entries ('32','4') for the 'Area of the scrap metal'. The student returns to this step in transaction 15 and correctly enters 13.76, but first finds the areas of the square and circle (transactions 13 and 14). The step (SCRAP-METAL-AREA Q1) therefore involved three transactions. These multiple transactions are also known as attempts for the given step.
| # | Student | Problem | Step | Attempt # | Student Input | Evaluation | Knowledge component |
|---|---|---|---|---|---|---|---|
| 1 | S01 | WATERING_VEGGIES | (SPRAY-RADIUS Q1) | 1 | 2 | CORRECT | Enter-Given |
| 2 | S01 | WATERING_VEGGIES | (WATERED-AREA Q1) | 1 | 12.56 | CORRECT | Circle-Area |
| 3 | S01 | WATERING_VEGGIES | (TOTAL-GARDEN Q1) | 1 | 39.43 | INCORRECT | |
| 4 | S01 | WATERING_VEGGIES | (TOTAL-GARDEN Q1) | 1 | 94.985 | INCORRECT | |
| 5 | S01 | WATERING_VEGGIES | (TOTAL-GARDEN Q1) | 2 | HINT | HINT | |
| 6 | S01 | WATERING_VEGGIES | (TOTAL-GARDEN Q1) | 3 | 30.25 | CORRECT | Rectangle-Area |
| 7 | S01 | WATERING_VEGGIES | (UNWATERED-AREA Q1) | 1 | 17.69 | CORRECT | Compose-Areas |
| 8 | S01 | WATERING_VEGGIES | DONE | 1 | DONE | CORRECT | Determine-Done |
| 9 | S01 | MAKING-CANS | (POG-RADIUS Q1) | 1 | 4 | CORRECT | Enter-Given |
| 10 | S01 | MAKING-CANS | (SQUARE-BASE Q1) | 1 | 8 | CORRECT | Enter-Given |
| 11 | S01 | MAKING-CANS | (SCRAP-METAL-AREA Q1) | 1 | 32 | INCORRECT | |
| 12 | S01 | MAKING-CANS | (SCRAP-METAL-AREA Q1) | 2 | 4 | INCORRECT | |
| 13 | S01 | MAKING-CANS | (SQUARE-AREA Q1) | 1 | 64 | CORRECT | Square-Area |
| 14 | S01 | MAKING-CANS | (POG-AREA Q1) | 1 | 50.24 | CORRECT | Circle-Area |
| 15 | S01 | MAKING-CANS | (SCRAP-METAL-AREA Q1) | 3 | 13.76 | CORRECT | Compose-Areas |
| 16 | S01 | MAKING-CANS | (POG-RADIUS Q2) | 1 | 8 | CORRECT | Enter-Given |
| 17 | S01 | MAKING-CANS | (SQUARE-BASE Q2) | 1 | 16 | CORRECT | Enter-Given |
| 18 | S01 | MAKING-CANS | (SQUARE-AREA Q2) | 1 | 256 | CORRECT | Square-Area |
| 19 | S01 | MAKING-CANS | (POG-AREA Q2) | 1 | 200.96 | CORRECT | Circle-Area |
| 20 | S01 | MAKING-CANS | (SCRAP-METAL-AREA Q2) | 1 | 55.04 | CORRECT | Compose-Areas |
| 21 | S01 | MAKING-CANS | (POG-RADIUS Q3) | 1 | 12 | CORRECT | Enter-Given |
| 22 | S01 | MAKING-CANS | (SQUARE-BASE Q3) | 1 | 24 | CORRECT | Enter-Given |
| 23 | S01 | MAKING-CANS | (SQUARE-AREA Q3) | 1 | 576 | CORRECT | Square-Area |
| 24 | S01 | MAKING-CANS | (POG-AREA Q3) | 1 | 452.16 | CORRECT | Circle-Area |
| 25 | S01 | MAKING-CANS | (SCRAP-METAL-AREA Q3) | 1 | 123.84 | CORRECT | Compose-Areas |
| 26 | S01 | MAKING-CANS | DONE | 1 | DONE | CORRECT | Determine-Done |
