Table 2.

Summary of deficits found in chronic schizophrenia and FEP patients.

Deficit	Studies in chronic schizophrenia patients	Studies in FEP patients
Decreased gain indicating a deficit in the control of smooth pursuit eye movements (SPEM)	Clementz et al. (1990), Abel et al. (1991), Iacono et al. (1992), Sweeney et al. (1993), Clementz et al. (1994), Levy et al. (1994), Sweeney et al. (1994), Clementz et al. (1996), Jacobsen et al. (1996), Thaker et al. (1996), Arolt et al. (1998), Levy et al. (2000), O’Driscoll and Callahan (2008), Lencer et al. (2010), Lencer et al. (2015), and Trillenberg et al. (2016)	Gooding et al. (1994), Hutton et al. (1998), Hutton et al. (2004), and Lencer et al. (2010)
Increased intra-subject variability of saccadic latencies indicating a deficit in cognitive stability	Smyrnis et al., 2009, Karantinos et al. (2014), Theleritis et al. (2014), and Damilou et al. (2016)	-
Increased spatial error and latency in memory-guided saccades indicating a deficit in volitional oculomotor control and spatial working memory	McDowell and Clementz (1996), Calkins et al. (2008), Camchong et al. (2008), Landgraf et al. (2008), and Caldani et al. (2016)	Reilly et al. (2006) and Reilly et al. (2007)
Higher error rate and latency in antisaccades indicating a deficit in volitional oculomotor control and inhibitory cognitive control	Clementz et al. (1994), Thaker et al. (1988), Sereno and Holzman (1995), Allen et al. (1996), Gooding et al. (1997), Radant et al. (1997, 2007), Crawford et al. (1998), Curtis et al. (2001), Reuter et al. (2005), Gooding and Basso (2008), Harris et al. (2009), Reilly et al. (2014), Millard et al. (2016), Caldani et al. (2016), and Kleineidam et al. (2019)	Hutton et al., 1998, Hutton et al. (2004), Harris et al. (2006), Nieman et al. (2007), De Wilde et al. (2008), Harris et al. (2009), Kirenskaya et al. (2017), and Kleineidam et al. (2019)
Lower responsive search score (RSS) indicating a deficit in selective attention and working memory	Kojima et al. (1990), Mather et al. (1992), Matsushima et al. (1992), Matsushima et al. (1998), Kojima et al. (2000), Kojima et al. (2001), Obayashi et al. (2001), Tonoya et al. (2002), Suzuki et al. (2009), Qiu et al. (2011), and Qiu et al. (2018)	Kojima et al. (1990)
Shorter scanpath length (in free view exploration tasks) indicating a deficit in volitional exploratory oculomotor behavior	Kojima et al. (1989), Kojima et al. (1990), Kojima et al. (1992), Obayashi et al. (2001), Ryu et al. (2001), Obayashi et al. (2003), Bestelmeyer et al. (2006), Benson et al. (2007), Takahashi et al. (2008), Beedie et al. (2012), and Sprenger et al. (2013)	Kojima et al. (1990)
For a detailed description of the deficits see Gooding and Basso (2008), Smyrnis et al. (2019), and Wolf et al. (2021)