We investigated the difference in performance on an implicit learning task between humans and machines in the auditory domain. Implicit learning is the process of ingesting information, such as patterns of everyday life, without being actively aware of doing so and without formal instruction. In pattern and anomaly detection, it is desirable to learn the patterns of everyday life in order to detect irregularities. In addition, we also considered how affect or emotion-like aspects interacts with this process. In our experiments, we created a synthetic pattern for both positive and negative sounds using a Markov grammar, which we then asked a machine-learning algorithm or humans to process. Results indicated that the generated pattern is a trivial task for even a simple RNN. For a similar but more complex task, humans performed significantly better under the condition of positive affect inducing sounds than they performed with negative sounds. Possibilities for the outcomes are discussed, along with other potential methods to compare human and machine implicit learning performance.
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