The dataset consists of two parts. Both parts are SPSS de-identified datasets obtained from online surveys. The first data set (labeled 1.1.0_data), downloaded from Qualtrics 16/03/2015 corresponds to the survey titled “Toward a new measure of Nationalism: Capturing Contemporary Australian Attitudes”. This data set comprises the raw data that was subsequently used for Study 1 and Study 3 data analyses. The second data set (labeled 2.1.0_data), downloaded from Qualtrics 09/10/2017 corresponds to the survey titled “The Australian national flag and national identity”. This data set comprises the raw data that was subsequently used for Study 2 and Study 4 data analyses.