Information overload is what happens when more input produces less usable knowledge.
Information overload is usually described as a problem of quantity. The deeper problem is that the mind cannot distinguish what matters, what can wait, and what should be discarded. A person can spend the day reading, listening, and watching while retaining no coherent structure from any of it.
The term describes a mismatch between information input and human processing capacity. When the stream exceeds the ability to compare, interpret, remember, and act, decision quality falls. The result is not simply tiredness. It is shallow evaluation, constant switching, dependence on headlines and other surface cues, and a growing inability to connect one piece of information to another.
When Input Becomes Noise
Information becomes useful only when it can be organised around a question, purpose, or structure. Without that organisation, additional material does not necessarily improve a decision. It can increase the number of apparent options while reducing the attention available for evaluating each one.
This is why an information-rich environment can produce intellectual poverty. The person remains exposed to more claims but becomes less capable of forming a durable judgment. The system keeps the mind moving, and motion is mistaken for learning.
The remedy begins with filtration, not acceleration. A bounded question, a trustworthy source hierarchy, and enough time to connect ideas restore the conditions under which information can become knowledge. The mind does not need every signal. It needs a structure that can tell signal from noise.
Source: Speier, C., Valacich, J.S. & Vessey, I. (1999), “The Influence of Task Interruption on Individual Decision Making: An Information Overload Perspective,” Decision Sciences, 30(2), 337-360; Simon, H.A. (1971), “Designing Organizations for an Information-Rich World.”