In this study, healthy participants were tested on the effects of hunger on risk preferences in two complementary tasks. In the experience-based task, participants learned the outcomes of options through sampling, whereas in the description-based task, the outcome probabilities and reward magnitudes were explicitly presented on the screen. The choices were further categorised into three different decision contexts: positive, negative or mixed decision context. Positive decision contexts concern choices between two options with equal expected value, but different level of risk, with outcomes above the average reward. Negative decision contexts concern choices between two options with equal expected value, but different level of risk, below the average reward. Mixed contexts concern choices between two options with different expected values.

Study details (excel file) contains the following fields:

Subject:                 number of participant
Session 1:             hunger (1) or sated (2)
Session 2:             hunger (1) or sated (2)
Age:                      age of participant
Gender:                 male (1) or female (2)
Height:                  height in m
Weight:                 weights in kg
Highest level of education
BMI:                      BMI of participant in kg/m2

Data Described Risk (excel file) contains the following fields:

Subject:                   Number of participant
Condition:                Hunger (1) or Sated (2)
Block:                      Block number 1-4
Decision Type:         Indicates the choice corresponding to Fig3B: Type 1-8: mixed context, type 9: negative context, type 10: positive context
Response:                Left (1) or right (2)
RT:                            reaction time in ms
Reward:                    win (1) or loss (0)
Total Score:              Running total number of points
Stim order:                [1,2] or [2,1] indicates whether the safe (1) or risky (2) stimulus was presented on the left or right.
Risky chosen:           Risky (1) or alternative (0) chosen    
High Mean Chosen:   High mean (1) or low mean (0) chosen in mixed contexts

Data Experienced Risk (excel file) contains the following fields:

Stimulus identities:
1 = High mean, Low variance
2 = High mean, High variance
3 = Low mean, Low variance
4 = Low mean, High variance

Sheet 1: Choices
Subject:                 Number of participant
Condition:              Hunger (1) or Sated (2)
Block:                     Block number 1-4
Trial Type:               Indicates the type of choice: Type 1-4 are sampling trials, type 5:  positive context, type 6-9: mixed context, type 10: negative context
Context:                  Type of context based on trial type: positive (1), negative (2), mixed (3) and forced trials (4)
Stim 1                      Identity of stimulus 1
Stim 2                      Identity of stimulus 2
Response:               Left (1) or Right (2)
Chosen Stim            Identity of the chosen stimulus
Reward Points         Total number of points
RT                            Reaction time in ms
RiskyChosen            Risky (1) or low risk (0) option chosen
HighMeanChosen    High mean (1) or Low mean (0) option chosen in mixed contexts

Sheet 2: Rating
Subject:               Number of participant
Condition:            Hunger (1) or Sated (2)
Block:                  Block number 1-4
Stim 1 cursor 1:   Rating cursor 1 for stim identity 1
Stim 2 cursor 1:   Rating cursor 1 for stim identity 2
Stim 3 cursor 1:   Rating cursor 1 for stim identity 3
Stim 4 cursor 1:   Rating cursor 1 for stim identity 4
Stim 1 cursor 2:    Rating cursor 2 for stim identity 1
Stim 2 cursor 2:    Rating cursor 2 for stim identity 2
Stim 3 cursor 2:    Rating cursor 2 for stim identity 3
Stim 4 cursor 2:    Rating cursor 2 for stim identity 4
Mean stim 1:         Average value of the two ratings for stim identity 1
Mean stim 2:         Average value of the two ratings for stim identity 2
Mean stim 3:         Average value of the two ratings for stim identity 3
Mean stim 4:         Average value of the two ratings for stim identity 4
Spread stim 1:      Spread (difference between two ratings) for stim  
identity 1
Spread stim 2:       Spread (difference between two ratings) for stim identity 2
Spread stim 3:        Spread (difference between two ratings) for stim identity 3
Spread stim 4:        Spread (difference between two ratings) for stim identity 4

Sheet 3: Parameters Gaussian
Subject:           Number of participant
Condition:        Hunger (1) or Sated (2)
b:                     Gaussian distributed softmax parameter
a_Q:                Gaussian distributed learning rate parameter for mean  values
a_S:                Gaussian distributed learning rate parameter for spread values
g0:                   Gaussian distributed Risk Propensity parameter    
g1:                   Gaussian distributed Sensitivity to context effects parameter

Sheet 4: Parameters transformed
Subject:           Number of participant
Condition:        Hunger (1) or Sated (2)
beta:                Transformed softmax parameter
alpha_Q:          Transformed learning rate parameter for mean  values
alpha_S:          Transformed learning rate parameter for spread values
gamma0:          Transformed Risk Propensity parameter        
gamma1:          Transformed Sensitivity to context effects parameter