The bottleneck mechanism occurs when the first stimulus is being processed, any other stimuli cannot be processed. The processing of the second stimulus is postponed which slows down reaction time. Neurons that take in information send this information to specific neural networks in different locations.
Sometimes the more telling statistic is the median, instead of the average â but in the age of average, it might take some effort to embrace the more accurate number.
Therefore the mean is not the best 'average' to use in this case. The median, on the other hand, really is the middle value. 50% of values are above it, and 50% below it. So when the data is not symmetrical, this is the form of 'average' that gives a better idea of any general tendency in the data. The same report from the IFS states that median real household incomes rose for the same period by 0.5%.