or does it depend on the reaction itself. I am conducting an experiment and the endothermic reactions have temperature changes of at least 8 degrees while the exothermic reactions have a change in 1 or 2 degrees. Is there a reason for that or is it just depending on the reaction?
It depends on the reaction enthalpy.
Both reaction groups have a wide range of absolute reaction enthalpies to cause negligible or huge temperature difference, supposing the system is isolated.
The problem with some highly endothermic reactions is that they often require quite forced reaction conditions like high temperature, so it may be problematic to determine the temperature change directly, e.g. by calorimetry.
The temperature change can be then estimated from the reaction enthalpy of the reverse exothermic reaction and the molar heat capacities.
The reaction enthalpy can be often calculated from tabelated values for particular compounds.