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Explanatory inferencing in simulation-based discovery learning: sequence analysis using the edit distance median string

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Abstract

Understanding scientific phenomena requires learners to construct mental models of causal systems. Simulation-based discovery learning offers learners the opportunity to construct mental models and test them against the behavior of a simulation. The purpose of this study was to investigate sequential patterns of learner actions and utterances associated with outcomes of simulation-based guided discovery learning. We conducted a sequence analysis of data gathered from 11 undergraduate students engaged in discovery learning. Three related methods were used for the sequence analysis: Levenshtein edit distance, k-means clustering of the Levenshtein distance, and the Kohonen generalized median sequence. The median sequences of high-gaining and low-gaining participants showed qualitative differences in how they gathered evidence, stated claims, and drew explanatory inferences. Differences between the sequences of actions and utterances of high-gaining and low-gaining participants suggested ways that students might be guided to enhance discovery learning. By tracking the learning patterns of learners, researchers can determine the conditions under which prompts should be provided and offer recommendations for transforming less effective learning strategies to more effective ones.

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Acknowledgements

This work was supported by a grant from the Social Sciences and Humanities Research Council of Canada.

Funding

This work was supported by a grant from the Social Sciences and Humanities Research Council of Canada (435-2019-0458) to John C. Nesbit.

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Correspondence to Teeba Obaid.

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Appendices

Appendix A: Inferencing during prediction phase and observation phase in DC circuit simulation

1. Inferencing (prediction phase)

Current throughout the circuit

The current stays the same throughout the resistors because the battery voltage has not changed

But, the current in the circuit is the result of: the voltage of the battery, and how much that push is impeded: the resistance of the bulb

The current does not stay the same throughout the resistors because we have resistors with different magnitudes that impede the flow of electrons

But, restricting the flow of electrons might cause the electrons to decrease in the entire circuit because in a one path circuit, the electrons have to go through all the resistors. (Questioning: Would the rate at which charge flows into a resistor be the same as the rate at which charge flows out of the resistor? Would restricting the flow of electrons cause the electrons to slow down in the entire circuit or would it cause the electrons to pile up when entering or exiting a resistor?)

The current stays the same because the effective resistance is the value of one or the value of sum of the resistors

2. Inferencing (observation phase)

Current throughout the circuit

Current is the flow of electrons

We have a constant voltage supply; No charge is entering or exiting the circuit

When we increase the resistance, either voltage must increase (we must give the electrons more energy each, to make up for what is lost in the resistor) or the current will reduce (the same amount of energy per electron is not able to ‘push’ them through the circuit’s resistance as fast)

The speed of electrons does not change when the current goes through different resistances. There are no leaks and no accumulated charges at different points of the circuit

The effective resistance is equal to the sum of the individual resistance

All the electrons have to flow from one resistor to the next resistor. When there is one path for the flow of electrons, there is no chance for more electrons to flow through the less ohm resistance

Voltage is different across resistors with different magnitudes but current remains the same when flows through resistors with different magnitudes

Appendix B: Possible experiment space and claim space

Experiment space

1. Constructing a circuit with one bulb/resistor and a battery

2. Measuring the change in current (using ammeter) when the resistance is increased/decreased

3. Observing the brightness of the bulb when resistance of the one bulb/resistor is reduced/increased

4. Measuring the current through each resistor and throughout the circuit

5. Without changing the voltage, observing the effect of changing the magnitude of one resistor out of the other resistors with different magnitudes

6. Observing the brightness of the bulbs with the same value of resistance

7. Measuring the current in the bulbs/resistors with the same magnitudes

8. Measuring the current throughout a circuit with multiple resistors that have the same magnitudes

9. Without changing the voltage, measuring the current (using ammeter) through resistors with different magnitudes

10. Observing the brightness of the bulbs with different magnitudes

Claim space

1. When the resistance increases, the current decreases; resistance decrease→current increase

2. The resistance increases, the light bulb gets dimmer; resistance decrease→bulb brighter

3. When using a circuit with a single bulb and when the resistance is zero, the bulb will stop glowing

4. When using a single bulb and when increasing the resistance, the light bulb will get dimmer

5. When the resistance is not changing, the current will be the same throughout the circuit

6. When using a circuit with multiple bulbs with the same magnitudes, the current will stay the same through each resistor and throughout the circuit

7. The brightness of the bulbs is the same in multiple resistors with the same magnitude

8. When the resistance is not changing, the current will be the same throughout the circuit that has multiple resistors with same magnitudes

9. When using a circuit with multiple bulbs with different magnitudes, the current will remain the same throughout the circuit

10. The bulb with higher resistance will be brighter

11. When the resistance is not changing, the current will be the same throughout the circuit that has multiple resistors with different magnitudes

Appendix C: Median sequence descriptions for cluster 1, cluster 2, cluster 3

E = Evidence C = Claim P = Prediction I = Inference

Median string 1

Description

Median string 2

Description

Median string 3

Description

R

Reading supplementary information

R

Reading supplementary information

R

Reading supplementary information

E1.2

Connecting objects with open switch

C1.6

Claim about what voltage is

C1.1

Claim about what circuit is

E1.1

Constructing circuit with irrelevant objects

C1.3

Claim about wire resistivity

C1.2

Claim about what electrons are

E1.10

Playing with the brightness of a bulb

E1.3

Constructing a circuit with closed switch

E1.7

Constructing a circuit with a bulb

E1.3

Constructing a circuit with closed switch

C1.1

Claim about what circuit is

E1.10

Playing with the brightness of a bulb

E3.6

Measuring the change in current (using ammeter) when the resistance is increased/decreased

E1.10

Playing with the brightness of a bulb

C1.7

Claim about what resistor is

C3.4

When the resistance increases, the current decreases; resistance decreases, current increases. There is an inverse relationship between resistance and current

E1.12

Measuring the increase and decrease of wire or battery resistivity

E1.2

Observing connected objects with open switch

E2.6

Observing the brightness of the bulb when the voltage is reduced/increased

E1.5

Constructing a circuit with a/multiple batteries without a resistor (battery on fire)

E1.3

Constructing a circuit with closed switch

C2.3

When the voltage increases, the current increases; voltage decreases, current decreases. There is a direct relationship between voltage and current

E1.7

Constructing a circuit with a bulb

E1.4

Observing connected objects without a battery

C3.4

When the resistance increases, the current decreases; resistance decreases, current increases. There is an inverse relationship between resistance and current

E2.5

Observing the flow that the electrons have when voltage increased/decreased

E2.1

Observing the voltage of the battery

P1

Predicting effective resistance

E2.4

Measuring the current (using ammeter) when the voltage is increased/decreased

E2.6

Observing the brightness of the bulb when the voltage is reduced/increased

P2

Predicting similarity/difference of current at locations distributed among the resistors

C1.3

Claim about wire resistivity

C1.6

Claim about what voltage is

P3

Predicting similarity/difference of voltage across resistors with different magnitudes

C2.1

When the voltage increases, the light bulb gets brighter; voltage decreases, the bulb gets dimmer

C2.1

When the voltage increases, the light bulb gets brighter; voltage decreases, the bulb gets dimmer

E4.1

Measuring the voltage (using voltmeter) across each resistor

C2.3

When the voltage increases, the current increases; voltage decreases, current decreases. There is a direct relationship between voltage and current

C2.3

When the voltage increases, the current increases; voltage decreases, current decreases. There is a direct relationship between voltage and current

E6.2

Measuring the current (using ammeter) in resistors with different magnitudes

C2.2

When the voltage increases, the current flows faster; voltage decrease, current flows slower

C2.2

When the voltage increases, the current flows faster; voltage decrease, current flows slower

C6.2

The current (using ammeter) is the same in resistors with different magnitudes

C1.4

Claim about the function of a bulb

E1.11

Observing the brightness of the bulb without resistance

  

E3.6

Measuring the change in current (using ammeter) when the resistance is increased/decreased

E3.1

Observing the brightness of the bulb when the resistance is reduced/increased

  

I1.2

With high voltage and low resistance, the current flows faster

E3.6

Measuring the change in current (using ammeter) when the resistance is increased/decreased

  

C3.4

When the resistance increases, the current decreases; resistance decreases, current increases. There is an inverse relationship between resistance and current

C1.7

Claim about what resistor is

  

C3.3

When the resistance increases, the current flows slower; resistance decrease, current flows faster

C3.1

When the resistance increases, the light bulb gets dimmer. The resistance decreases, the bulb gets brighter

  

I1.1

Increasing/decreasing resistance would affect the current but would not affect the voltage of the battery and vice versa (i.e., Increasing/decreasing voltage would affect the current but would not affect the resistance)

C3.4

When the resistance increases, the current decreases; resistance decreases, current increases. There is an inverse relationship between resistance and current

  

P1

Predicting effective resistance

C3.3

When the resistance increases, the current flows slower; resistance decrease, current flows faster

  

I1.3

With low voltage and high resistance, the current stops or decreases

I1.4

Current is affected by both the voltage and the resistance

  

P2

Predicting similarity/difference of current at locations distributed among the resistors

I1.1

Increasing/decreasing resistance would affect the current but would not affect the voltage of the battery and vice versa (i.e., Increasing/decreasing voltage would affect the current but would not affect the resistance)

  

I3.1

The current stays the same throughout the resistors because the battery voltage has not changed

P1

Predicting effective resistance

  

P3

Predicting similarity/difference of voltage across resistors with different magnitudes

I2.3

The effective resistance could be the sum of all resistances because the current would slow down less in lower resistances and slow down more in higher resistances

  

I2.3

The effective resistance could be the sum of all resistances because the current would slow down less in lower resistances and slow down more in higher resistances

I3.3

The current does not stay the same in the resistors because we have resistors with different magnitudes that impede the flow of electrons

  

I4.2

Because the current is the same throughout the circuit, the voltage will stay the same across the circuit. If the current is not changing, the voltage hasn’t been changed either

P3

Predicting similarity/difference of voltage across resistors with different magnitudes

  

E4.1

Measuring the voltage (using voltmeter) across each resistor

I4.1

Voltage is a driving force produced by a battery that can drive a current through a circuit. The greater the voltage the greater will be the current flowing

  

I4.1

Voltage is a driving force produced by a battery that can drive a current through a circuit. The greater the voltage the greater will be the current flowing

E6.1

Observing the speed of electrons after going through resistors with different magnitudes

  

E6.2

Measuring the current (using ammeter) in resistors with different magnitudes

I6.2

The resistors slow the overall current but don’t change the current from resistor to resistor

  

C6.2

The current (using ammeter) is the same in resistors with different magnitudes

E7

Without changing the voltage, observing the effect of changing the magnitude of one resistor out of the other resistors with different magnitudes

  

E8

Observing the effective resistance by comparing the circuit to the reduced equivalent circuit

I2.3

The effective resistance could be the sum of all resistances because the current would slow down less in lower resistances and slow down more in higher resistances

  

C8.1

We need to add up the resistances

E6.2

Measuring the current (using ammeter) in resistors with different magnitudes

  

I4.3

The current does not stay the same throughout the resistors because we have resistors with different magnitudes. Therefore, the voltage will be different across each resistor

E4.3

Observing the voltage drop when the order of the resistors is changed

    

I6.6

The electrons have to flow from one resistor to the next. The resistors slow down the whole current in total

    

I6.3

When we increase the resistance, we must increase the voltage as well; otherwise, the current will reduce

    

E8

Observing the effective resistance by comparing the circuit to the reduced equivalent circuit

    

C4.1

The voltage is different across each resistor

    

E8

Observing the effective resistance by comparing the circuit to the reduced equivalent circuit

    

C8.1

We need to add up the resistances

    

I6.5

The current is slowed down according to the added-up ohms of all the resistors

    

I5.9

The amount of voltage drop in resistors/light bulbs depends on the voltage supplied to the resistors/light bulbs and their resistance (i.e., magnitude of the resistors)

    

E7

Without changing the voltage, observing the effect of changing the magnitude of one resistor out of the other resistors with different magnitudes

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Obaid, T., Nesbit, J.C., Mahmoody Ghaidary, A. et al. Explanatory inferencing in simulation-based discovery learning: sequence analysis using the edit distance median string. Instr Sci 51, 309–341 (2023). https://doi.org/10.1007/s11251-022-09614-4

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