The mainquestions being asked towards studies on perception are what exactly isperception and if it could be interpreted, quantified or measurable. Perceptioncould be understood as a process of being made aware of an occurrence using thesenses. Does this make it any different compared to a sensation? Yes, in theaspect of sensation it is a detection of what has happened, whereas perceptionis the interpretation of the occurrence using the questions of who, what,where, why, when, where and how.
“Perception is not asimple passive registration of sensory input, it is a process where we activelyselect, order and interpret information in order to understand and interactwith the environment.” (Herman). An example would be when someone sees a cargoing straight towards that same person.
The process of perception can beapplied to this scenario. It would start off as the environment being theperceivable objects surrounding the person and to what is currently being focusedby the person. Next would be the actual mechanical process, as to the stimulusbeing the car going towards the person, the energy traveling from the stimulusto the brain, receive the perceived stimulus and evaluating it. Last would bethe perception and interpretation of the stimulus, being the car and the courseof action for the person involved which is to move out of the way of the car.The recognition of the stimulus is what determines the perception orinterpretation of the stimulus.
Most recognitions in terms of perception is classifiedas a top-down recognition process, in which the stimulus undergoesinterpretation through the knowledge of the person which is not purely sensory. The useof perception as a measurement for the detection of bias within public opinionis the focus of this in which we will give emphasis on. In the use ofperception there must be a bare minimum to qualify as part of a perception inwhich is called the threshold.Thethree types to measure this threshold are as follows:1. Methodof LimitsInfinding the threshold through this method, the extremes of each stimulus, whichis present in a specific order will be computed into the average.
The averagewill then become the threshold for the stimulus detected. 2. Methodof Adjustment Thismethod is repeated several times with difference in intensity of the stimulusto the point where the stimulus is no longer detectable. Thepoints of stimuli not detected are considered the threshold of this method.
3. Methodof Constant StimuliThismethod is presented to the observer with a randomly ordered set of stimuli inwhich the threshold is always 50% detected and 50% not detected.